diff --git a/src/java/com/threerings/presents/dobj/RootDObjectManager.java b/src/java/com/threerings/presents/dobj/RootDObjectManager.java
index bb98f8ad1..dc5ab0559 100644
--- a/src/java/com/threerings/presents/dobj/RootDObjectManager.java
+++ b/src/java/com/threerings/presents/dobj/RootDObjectManager.java
@@ -21,34 +21,34 @@
 
 package com.threerings.presents.dobj;
 
+import com.samskivert.util.RunQueue;
+
 /**
- * The root distributed object manager extends the basic distributed
- * object manager interface with methods that can only be guaranteed to
- * work in the virtual machine that is hosting the distributed objects in
- * question. VMs that operate proxies of objects can only implement the
+ * The root distributed object manager extends the basic distributed object manager interface with
+ * methods that can only be guaranteed to work in the virtual machine that is hosting the
+ * distributed objects in question. VMs that operate proxies of objects can only implement the
  * basic distributed object manager interface.
  */
-public interface RootDObjectManager extends DObjectManager
+public interface RootDObjectManager extends DObjectManager, RunQueue
 {
     /**
-     * Looks up and returns the requested distributed object in the dobj
-     * table, returning null if no object exists with that oid.
+     * Looks up and returns the requested distributed object in the dobj table, returning null if
+     * no object exists with that oid.
      */
     public DObject getObject (int oid);
 
     /**
-     * Registers a distributed object instance of the supplied class with the
-     * system and assigns it an oid. When the call returns the object will be
-     * registered with the system and its oid will have been assigned.
+     * Registers a distributed object instance of the supplied class with the system and assigns it
+     * an oid. When the call returns the object will be registered with the system and its oid will
+     * have been assigned.
      *
      * @return the registered object for the caller's convenience.
      */
     public <T extends DObject> T registerObject (T object);
 
     /**
-     * Requests that the specified object be destroyed. Once destroyed an
-     * object is removed from the runtime system and may no longer have
-     * events dispatched on it.
+     * Requests that the specified object be destroyed. Once destroyed an object is removed from
+     * the runtime system and may no longer have events dispatched on it.
      *
      * @param oid The object id of the distributed object to be destroyed.
      */
diff --git a/src/java/com/threerings/presents/util/ResultListenerList.java b/src/java/com/threerings/presents/util/ResultListenerList.java
new file mode 100644
index 000000000..a116201f9
--- /dev/null
+++ b/src/java/com/threerings/presents/util/ResultListenerList.java
@@ -0,0 +1,50 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.presents.util;
+
+import java.util.ArrayList;
+
+import com.threerings.presents.client.InvocationService;
+
+/**
+ * Maintains a list of result listeners, dispatching the eventual actual result or failure to them
+ * all as if they were a single listener.
+ */
+public class ResultListenerList extends ArrayList<InvocationService.ResultListener>
+    implements InvocationService.ResultListener
+{
+    // from InvocationService.ResultListener
+    public void requestProcessed (Object result)
+    {
+        for (InvocationService.ResultListener listener : this) {
+            listener.requestProcessed(result);
+        }
+    }
+
+    // from InvocationService.ResultListener
+    public void requestFailed (String cause)
+    {
+        for (InvocationService.ResultListener listener : this) {
+            listener.requestFailed(cause);
+        }
+    }
+}