As you know, recently the XMPP-CORE got the IETF nod, the other half of the equation, XMPP-IM, was Approved on Monday. Instant Messaging Planet has a good writeup on what this means for Jabber.

This is great news for those of us who have adopted Jabber technology and deployed servers, and for those of you who are still flipping between AIM, ICQ, MSN, an Yahoo!, give Jabber a try. There are several clients available, but I would suggest my favorite, Psi, which runs on Linux, Mac OSX, and Linux.