I've released IDEtalk 0.5.4. This is bugfix release, for details please see this mailing list post.
Recently I've found a message from Alexis Moussine-Pouchkine regarding collaboration in Sun Java Studio Enterprise 7. If Sun will open their collaboraiton API, I'll probably implement the transport which would allow IDEtalk to talk with JSE 7. But not earlier than Jabber transport will be ready :).