SoC jabber xmpp

As I'm sure you've all seen by now, one of the projects accepted for SoC this year will be to implement an XMPP module. The module will allow your website to send instant messages to users in much the same way that it currently sends e-mail. The idea is that short and/or frequent messages shouldn't clutter your inbox, and can go to your IM client instead. I've got quite a bit to do before I can start writing code for this, but in case anyone is anxious to supply ideas, ask questions, whatever, feel free to do so.