Updated, unmaintained, Jabber (XMP) protocol code: http://code.google.com/p/xmpphp
The original code is not maintained any more (since 2009)

According to the following fork chart:
https://github.com/cweiske/xmpphp/network
User: vitotafuni seam to maintain the most updated version of XMP (Jabber)
I am suggesting a code review of the changes and a quick update to latest code version: https://github.com/vitotafuni/xmpphp

I have already applied this patch to the latest version to moodle.org/master (from: 27-9-2012) and added a working branch: WIP-MDL-35706-master_jabber for code review.