Nice Jabber IM Programmers Overview …
Jabber is a open source solution for Presence and Instant Messaging. I am still a big fan of Jabber … I believe that it is still looking for some big visibility, and I’m thinking that it will get this through a killer-app that will support Jabber. Here is a good start for developers to write support for Jabber into their code.

Jens Alfke: Jabber Client Developer’s Cheat Sheet. [Scripting News]