Thanks - but could you drop us some test login and password? Or possible two of them, so testers could immediately login and see what happens :)
We were developing the chat program on our own this year, it's available under http://minibb.org/chat/
- you could use test logins provided on the first page of minibb.org
It was designed for mobile devices and it uses kind of new approach regarding private chats, it's only about one generic chat and it's only about members-only chat, it also uses the archiving possibility to keep all older posts reviewed in a forum-like read-only manner at any later time (that way building another side of indexed content). I doubt that something related to some private website, would need a lot of chat rooms, specially those created by users themselves, languages, flags... whatever stuff you have now on your chat, is not that important to a live website at all.