BuddyPress.org

I use the chat add on from Wibiya Toolbar (Tiny Chat) and we had a big event with over 30 people in the chat room at once(http://freelancerunplugged.com/blog/chat-your-face-off-review/)! it worked great but there is no friend feature. The good thing though is that it puts a little number in brackets next to the Join Chat button on the bottom toolbar so you know how many people are in the chat – but would love a buddypress chat option – it would surely kick Facebooks dodgy chat!