Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
Anybody interested in php/ajax chat to integrate with Vanilla 2?
Well, I found such thingie which can be integrated with v2 easily: users, including profile details and group permissions. Not free, however. I am not sure if i am allowed to put a public link here, so if you need the URL of this chat drop me a line. This is a screenshot: http://img72.imageshack.us/img72/7484/vanilla2.png