Yahoo! Avatar World - Yet another Flash application31 May 2007
Avatar World is Yahoo! messenger plug-in, that allows you to create customized visual chat-rooms and invite friends to join it. You can read more about it on Yahoo! Gallery.
This plug-in is not final release, it's just preview release and that's why it's very slow when you use it. It's a Adobe Flash Application at the core.
BTW! I was about to work on Yahoo! Avatars project when I was working for Yahoo! Bangalore but I left Yahoo! before that.