diff --git a/src/as/com/threerings/io/ObjectInputStream.as b/src/as/com/threerings/io/ObjectInputStream.as
index dd4da198e..11bf8e341 100644
--- a/src/as/com/threerings/io/ObjectInputStream.as
+++ b/src/as/com/threerings/io/ObjectInputStream.as
@@ -57,7 +57,7 @@ public class ObjectInputStream
                 _classMap[code] = cmap;
 
             } else {
-                cmap = _classMap[code];
+                cmap = (_classMap[code] as ClassMapping);
                 if (null == cmap) {
                     throw new IOError("Read object for which we have no " +
                         "registered class metadata.");
@@ -107,13 +107,20 @@ public class ObjectInputStream
         }
     }
 
+    /**
+     * @param type either a String representing the java type,
+     *             or a Class object representing the actionscript type.
+     */
     // TODO: this is the equivalent of marshalling something for which
     // we have a basic streamer. Fill out with all the java types
-    public function readField (clazz :Class) :Object
+    public function readField (type :Object) :Object
         //throws IOError
     {
         if (readBoolean()) {
-            var streamer :Streamer = Streamer.getStreamerByClass(clazz);
+            var streamer :Streamer = (type is Class)
+                ? Streamer.getStreamerByClass(type as Class)
+                : Streamer.getStreamerByJavaName(type as String);
+
             var obj :Object = streamer.createObject(this);
             streamer.readObject(obj, this);
             return obj;
diff --git a/src/as/com/threerings/io/ObjectOutputStream.as b/src/as/com/threerings/io/ObjectOutputStream.as
index bc5f7bbb6..36c7bf466 100644
--- a/src/as/com/threerings/io/ObjectOutputStream.as
+++ b/src/as/com/threerings/io/ObjectOutputStream.as
@@ -24,7 +24,13 @@ public class ObjectOutputStream
             return;
         }
 
-        var cname :String = ClassUtil.getClassName(obj);
+        var cname :String;
+        if (obj is TypedArray) {
+            cname = (obj as TypedArray).getJavaType();
+
+        } else {
+            cname = ClassUtil.getClassName(obj);
+        }
         // look up the class mapping record
         var cmap :ClassMapping = (_classMap.get(cname) as ClassMapping);
 
@@ -166,7 +172,7 @@ public class ObjectOutputStream
     /**
      * Used by a Streamer that is writing an array of Streamable instances.
      */
-    protected function setCurrent (streamer :Streamer, current :Object)
+    internal function setCurrent (streamer :Streamer, current :Object)
     {
         _streamer = streamer;
         _current = current;
diff --git a/src/as/com/threerings/io/Streamer.as b/src/as/com/threerings/io/Streamer.as
index 3e688afc5..94fb8b77c 100644
--- a/src/as/com/threerings/io/Streamer.as
+++ b/src/as/com/threerings/io/Streamer.as
@@ -10,6 +10,7 @@ import com.threerings.io.streamers.ArrayStreamer;
 import com.threerings.io.streamers.ByteArrayStreamer;
 import com.threerings.io.streamers.IntStreamer;
 import com.threerings.io.streamers.NumberStreamer;
+import com.threerings.io.streamers.ObjectArrayStreamer;
 import com.threerings.io.streamers.StringStreamer;
 
 public class Streamer
@@ -28,6 +29,13 @@ public class Streamer
             }
         }
 
+        if (obj is TypedArray) {
+            var streamer :Streamer = new ArrayStreamer(
+                (obj as TypedArray).getJavaType());
+            _streamers.push(streamer);
+            return streamer;
+        }
+
         return undefined;
     }
 
@@ -35,6 +43,10 @@ public class Streamer
     {
         initStreamers();
 
+        if (clazz === TypedArray) {
+            throw new Error("Broken, TODO");
+        }
+
         for each (var streamer :Streamer in _streamers) {
             if (streamer._target == clazz) {
                 return streamer;
@@ -48,16 +60,18 @@ public class Streamer
     {
         initStreamers();
 
-        if (jname.charAt(0) === "[") {
-            // Oh ghod
-        }
-
         for each (var streamer :Streamer in _streamers) {
             if (streamer.getJavaClassName() === jname) {
                 return streamer;
             }
         }
 
+        if (jname.charAt(0) === "[") {
+            var streamer :Streamer = new ArrayStreamer(jname);
+            _streamers.push(streamer);
+            return streamer;
+        }
+
         return null;
     }
 
@@ -122,7 +136,7 @@ public class Streamer
                 new StringStreamer(),
                 new IntStreamer(),
                 new NumberStreamer(),
-                new ArrayStreamer(),
+                new ObjectArrayStreamer(),
                 new ByteArrayStreamer()
             ];
         }
@@ -132,10 +146,6 @@ public class Streamer
 
     protected var _jname :String;
 
-    /** If our target class is an array, this is a reference to a streamer
-     * that can stream our array elements, otherwise it is null. */
-    protected var _delegate :Streamer;
-
     /** Just a list of our standard streamers. */
     protected static var _streamers :Array;
 }
diff --git a/src/as/com/threerings/io/TypedArray.as b/src/as/com/threerings/io/TypedArray.as
new file mode 100644
index 000000000..60761b657
--- /dev/null
+++ b/src/as/com/threerings/io/TypedArray.as
@@ -0,0 +1,19 @@
+package com.threerings.io {
+
+public dynamic class TypedArray extends Array
+{
+    public function TypedArray (jtype :String)
+    {
+        _jtype = jtype;
+    }
+
+    public function getJavaType () :String
+    {
+        return _jtype;
+    }
+
+    /** The 'type' of this array, which doesn't really mean anything
+     * except gives it a clue as to how to stream to our server. */
+    protected var _jtype :String;
+}
+}
diff --git a/src/as/com/threerings/io/streamers/ArrayStreamer.as b/src/as/com/threerings/io/streamers/ArrayStreamer.as
index aaca73032..8e5023dfe 100644
--- a/src/as/com/threerings/io/streamers/ArrayStreamer.as
+++ b/src/as/com/threerings/io/streamers/ArrayStreamer.as
@@ -1,22 +1,55 @@
 package com.threerings.io.streamers {
 
+import com.threerings.util.ClassUtil;
+
 import com.threerings.io.ObjectInputStream;
 import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamer;
+import com.threerings.io.TypedArray;
+
+import com.threerings.presents.Log;
 
 /**
  * A Streamer for Array objects.
  */
 public class ArrayStreamer extends Streamer
 {
-    public function ArrayStreamer ()
+    public function ArrayStreamer (jname :String)
     {
-        super(Array, "[Ljava.lang.Object");
+        super(TypedArray, jname);
+
+        if (jname.charAt(1) === "[") {
+            // if we're a multi-dimensional array then we need a delegate
+            _delegate = Streamer.getStreamerByJavaName(jname.substring(1));
+            _isFinal = true; // it just is
+
+        } else {
+            if (jname.charAt(1) === "L") {
+                // form is "[L<class>;"
+                var baseClass :String = jname.substring(2, jname.length - 1);
+                baseClass = Translations.getFromServer(baseClass);
+                _elementType = ClassUtil.getClassByName(baseClass);
+                _isFinal = ClassUtil.isFinal(_elementType);
+
+            } else {
+                Log.warning("Other array types are currently not handled yet " +
+                    "[jname=" + jname + "].");
+                throw new Error("Unimplemented bit");
+            }
+        }
+    }
+
+    public override function isStreamerFor (obj :Object) :Boolean
+    {
+        return (obj is TypedArray) &&
+            ((obj as TypedArray).getJavaType() === _jname);
     }
 
     public override function createObject (ins :ObjectInputStream) :Object
     {
-        return new Array(ins.readInt());
+        var ta :TypedArray = new TypedArray(_jname);
+        ta.length = ins.readInt();
+        return ta;
     }
 
     public override function writeObject (obj :Object, out :ObjectOutputStream)
@@ -24,8 +57,26 @@ public class ArrayStreamer extends Streamer
     {
         var arr :Array = (obj as Array);
         out.writeInt(arr.length);
-        for (var ii :int = 0; ii < arr.length; ii++) {
-            out.writeObject(arr[ii]);
+        if (_isFinal) {
+            var mask :ArrayMask = new ArrayMask(arr.length);
+            for (var ii :int = 0; ii < arr.length; ii++) {
+                if (arr[ii] != null) {
+                    mask.setBit(ii);
+                }
+            }
+            mask.writeTo(out);
+            // now write the populated elements
+            for (var ii :int = 0; ii < arr.length; ii++) {
+                var element :Object = arr[ii];
+                if (element != null) {
+                    out.writeBareObjectImpl(element, _delegate);
+                }
+            }
+
+        } else {
+            for (var ii :int = 0; ii < arr.length; ii++) {
+                out.writeObject(arr[ii]);
+            }
         }
     }
 
@@ -33,9 +84,37 @@ public class ArrayStreamer extends Streamer
             :void
     {
         var arr :Array = (obj as Array);
-        for (var ii :int = 0; ii < arr.length; ii++) {
-            arr[ii] = ins.readObject();
+        if (_isFinal) {
+            var mask :ArrayMask = new ArrayMask();
+            mask.readFrom(ins);
+            for (var ii :int = 0; ii < length; ii++) {
+                if (mask.isSet(ii)) {
+                    var target :Object;
+                    if (_delegate == null) {
+                        target = new _elementType();
+                    } else {
+                        target = _delegate.createObject(ins);
+                    }
+                    ins.readBareObjectImpl(target, _delegate);
+                    this[ii] = target;
+                }
+            } 
+
+        } else {
+            for (var ii :int = 0; ii < arr.length; ii++) {
+                arr[ii] = ins.readObject();
+            } 
         }
     }
+
+    /** A streamer for our elements. */
+    protected var _delegate :Streamer;
+
+    /** If this is the final dimension of the array, the element type. */
+    protected var _elementType :Class;
+
+    /** Whether we're final or not: true if we're not the final dimension
+     * or if the element type is final. */
+    protected var _isFinal :Boolean;
 }
 }
diff --git a/src/as/com/threerings/io/streamers/ObjectArrayStreamer.as b/src/as/com/threerings/io/streamers/ObjectArrayStreamer.as
new file mode 100644
index 000000000..153df8d54
--- /dev/null
+++ b/src/as/com/threerings/io/streamers/ObjectArrayStreamer.as
@@ -0,0 +1,48 @@
+package com.threerings.io.streamers {
+
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.ObjectOutputStream;
+import com.threerings.io.Streamer;
+import com.threerings.io.TypedArray;
+
+/**
+ * A Streamer for Array objects.
+ */
+public class ObjectArrayStreamer extends Streamer
+{
+    public function ObjectArrayStreamer ()
+    {
+        super(Array, "[Ljava.lang.Object;");
+    }
+
+    public override function isStreamerFor (obj :Object) :Boolean
+    {
+        // don't let TypedArrays be streamed with this streamer
+        return !(obj is TypedArray) && super.isStreamerFor(obj);
+    }
+
+    public override function createObject (ins :ObjectInputStream) :Object
+    {
+        return new Array(ins.readInt());
+    }
+
+    public override function writeObject (obj :Object, out :ObjectOutputStream)
+            :void
+    {
+        var arr :Array = (obj as Array);
+        out.writeInt(arr.length);
+        for (var ii :int = 0; ii < arr.length; ii++) {
+            out.writeObject(arr[ii]);
+        }
+    }
+
+    public override function readObject (obj :Object, ins :ObjectInputStream)
+            :void
+    {
+        var arr :Array = (obj as Array);
+        for (var ii :int = 0; ii < arr.length; ii++) {
+            arr[ii] = ins.readObject();
+        }
+    }
+}
+}
diff --git a/src/as/com/threerings/presents/dobj/DObject.as b/src/as/com/threerings/presents/dobj/DObject.as
index bd3f96003..eaea8684b 100644
--- a/src/as/com/threerings/presents/dobj/DObject.as
+++ b/src/as/com/threerings/presents/dobj/DObject.as
@@ -29,6 +29,9 @@ public class DObject // extends EventDispatcher
 
     public function addSubscriber (sub :Subscriber) :void
     {
+        if (_subscribers == null) {
+            _subscribers = new ArrayCollection();
+        }
         if (!_subscribers.contains(sub)) {
             _subscribers.addItem(sub);
         }
@@ -36,6 +39,9 @@ public class DObject // extends EventDispatcher
 
     public function removeSubscriber (sub :Subscriber) :void
     {
+        if (_subscribers == null) {
+            return;
+        }
         var dex :int = _subscribers.getItemIndex(sub);
         if (dex != -1) {
             _subscribers.removeItemAt(dex);
diff --git a/src/as/com/threerings/util/ClassUtil.as b/src/as/com/threerings/util/ClassUtil.as
index f727ba695..8568055a2 100644
--- a/src/as/com/threerings/util/ClassUtil.as
+++ b/src/as/com/threerings/util/ClassUtil.as
@@ -32,11 +32,13 @@ public class ClassUtil
 
     public static function isFinal (type :Class) :Boolean
     {
-        var attrs :XMLList = describeType(type).elements("type");
+        if (type === String) {
+            return true;
+        }
 
-        // FUCK!!! This information is lost in the Class introspection
-
-        return true; //TODO
+        // TODO: there's currently no way to determine final from the class
+        //var attrs :XMLList = describeType(type).elements("type");
+        return false;
     }
 }
 }
diff --git a/src/as/com/threerings/util/TypedArray.as b/src/as/com/threerings/util/TypedArray.as
deleted file mode 100644
index ab39ea13c..000000000
--- a/src/as/com/threerings/util/TypedArray.as
+++ /dev/null
@@ -1,89 +0,0 @@
-package com.threerings.util {
-
-import mx.utils.ObjectUtil;
-
-import com.threerings.io.ArrayMask;
-import com.threerings.io.Streamer;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-import com.threerings.io.Streamable;
-
-import com.threerings.presents.Log;
-
-public dynamic class TypedArray extends Array
-    implements Streamable
-{
-    // TODO: remove the isFinal parameter and determine it
-    // be introspecting on the class
-    public function TypedArray (type :Class, isFinal :Boolean, length :int = 0)
-    {
-        super(length);
-        _type = type;
-        _final = isFinal;
-        _delegate = Streamer.getStreamerByClass(type);
-    }
-
-    // documentation inherited from interface Streamable
-    public function readObject (ins :ObjectInputStream) :void
-    {
-        if (_final) {
-            var mask = new ArrayMask();
-            mask.readFrom(ins);
-            for (var ii :int = 0; ii < length; ii++) {
-                if (mask.isSet(ii)) {
-                    var target :Object;
-                    if (_delegate == null) {
-                        target = new _type();
-                    } else {
-                        target = _delegate.createObject(ins);
-                    }
-                    ins.readBareObjectImpl(target, _delegate);
-                    this[ii] = target;
-                }
-            }
-
-        } else {
-            for (var ii :int = 0; ii < length; ii++) {
-                this[ii] = ins.readObject();
-            }
-        }
-    }
-
-    // documentation inherited from interface Streamable
-    public function writeObject (out :ObjectOutputStream) :void
-    {
-        out.writeInt(length);
-        if (_final) {
-            var mask :ArrayMask = new ArrayMask(length);
-            for (var ii :int = 0; ii < length; ii++) {
-                if (this[ii] != null) {
-                    mask.set(ii);
-                }
-            }
-            mask.writeTo(out);
-            // now write the populated elements
-            for (var ii :int = 0; ii < length; ii++) {
-                var element :Object = this[ii];
-                if (element != null) {
-                    out.writeBareObjectImpl(element, _delegate);
-                }
-            }
-
-        } else {
-            for (var ii :int = 0; ii < length; ii++) {
-                out.writeObject(this[ii]);
-            }
-        }
-    }
-
-    /** The 'type' of this array, which doesn't really mean anything
-     * except gives it a clue as to how to stream to our server. */
-    protected var _type :Class;
-
-    /** Whether or not the type of the array represents a final class. */
-    protected var _final :Boolean;
-
-    protected var _delegate :Streamer;
-}
-}