Using Spark with google talk does not work completely. Exceptions are below and the main problem seems to be that you cannot initiate or send messages from the gtalk side to users on jivesoftware.com (although messages go from jivesoftware.com to gtalk). Nov 7, 2006 5:11:51 PM org.jivesoftware.spark.util.log.Log error SEVERE: Unable to contact shared group info. feature-not-implemented(501) at org.jivesoftware.smackx.SharedGroupManager.getSharedGroups(SharedGroupManager.java:49) at org.jivesoftware.spark.ui.ContactList$17.construct(ContactList.java:1428) at org.jivesoftware.spark.util.SwingWorker$2.run(SwingWorker.java:132) at java.lang.Thread.run(Unknown Source) Nov 7, 2006 5:11:51 PM org.jivesoftware.spark.util.log.Log error SEVERE: Unable to load private data for bookmarks. feature-not-implemented(501) at org.jivesoftware.smackx.PrivateDataManager.getPrivateData(PrivateDataManager.java:213) at org.jivesoftware.spark.ui.conferences.Conferences$4.construct(Conferences.java:205) at org.jivesoftware.spark.util.SwingWorker$2.run(SwingWorker.java:132) at java.lang.Thread.run(Unknown Source) Nov 7, 2006 5:11:52 PM org.jivesoftware.spark.util.log.Log error SEVERE: Unable to load MUC Service Names. service-unavailable(503) at org.jivesoftware.smackx.ServiceDiscoveryManager.discoverItems(ServiceDiscoveryManager.java:460) at org.jivesoftware.smackx.ServiceDiscoveryManager.discoverItems(ServiceDiscoveryManager.java:426) at org.jivesoftware.smackx.muc.MultiUserChat.getServiceNames(MultiUserChat.java:221) at org.jivesoftware.spark.ui.conferences.BookmarkedConferences$11.construct(BookmarkedConferences.java:312) at org.jivesoftware.spark.util.SwingWorker$2.run(SwingWorker.java:132) at java.lang.Thread.run(Unknown Source) Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1 at java.util.Vector.elementAt(Unknown Source) at javax.swing.DefaultListModel.getElementAt(Unknown Source) at org.jivesoftware.spark.ui.ContactGroup$ListMotionListener.mouseMoved(ContactGroup.java:717) at org.jivesoftware.spark.ui.ContactGroup$4.actionPerformed(ContactGroup.java:678) at javax.swing.Timer.fireActionPerformed(Unknown Source) at javax.swing.Timer$DoPostEvent.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Nov 7, 2006 5:11:54 PM org.jivesoftware.spark.util.log.Log error SEVERE: java.lang.ArrayIndexOutOfBoundsException: -1 at java.util.Vector.elementAt(Unknown Source) at javax.swing.DefaultListModel.getElementAt(Unknown Source) at org.jivesoftware.spark.ui.ContactGroup.mouseExited(ContactGroup.java:371) at java.awt.AWTEventMulticaster.mouseExited(Unknown Source) at java.awt.AWTEventMulticaster.mouseExited(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.trackMouseEnterExit(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Nov 7, 2006 5:11:55 PM org.jivesoftware.spark.util.log.Log error SEVERE: feature-not-implemented(501) at org.jivesoftware.smackx.PrivateDataManager.getPrivateData(PrivateDataManager.java:213) at org.jivesoftware.sparkimpl.plugin.bookmarks.BookmarkPlugin$1.construct(BookmarkPlugin.java:53) at org.jivesoftware.spark.util.SwingWorker$2.run(SwingWorker.java:132) at java.lang.Thread.run(Unknown Source)