Was curious as to where the Psi Jabber Client was in implementing the complete XMPP 1.0 protocol now that it has become a proposed standard by the IETF. The feature that is most lacking in Psi, is Multi User Chat (MUC) or JEP-0045. The older Groupchat protocol is supported, but lacking are advanced features such as moderation and creating and maintaining persistent rooms.
The Psi Development Roadmap has a definte plan for completing the XMPP 1.0 implementation and MUC support
There is also a MUC Feature Status Page where you can monitor progress on this feature.

