The Jabber Developer’s Handbook [amazon] by Dana Moore and William Wright will be coming out in the next couple of months. I’m really excited about it. It looks to be oriented toward machine to machine communication (messaging, RPC, etc) using Jabber.
I looked at Instant Messaging in Java, which looks great for creating chat clients. I’m going to take a closer look at Programming Jabber, but at first glance it seemed to be all-perl. That’s not a bad thing, I just seem to have a hard time wrapping my head around perl stuff sometimes.
Big things will happen in the future with Jabber/XMPP as the transport protocol, and I’m not talking about Ronnie and Kim trading gossip over IM.