The 3 smart folks (guy and gals) behind Meebo are doing hell of a job and I wish them all the best. You guys rock!! Keep up the good work. Two weeks online and already gaining lots of attention and deservingly so.
As Wikipedia puts it:
Meebo is an Ajax instant messaging client that works with major instant messaging services, including AOL, ICQ, Yahoo! Messenger, MSN Messenger and Jabber.
It launched a private release on September 4, 2005, and it was publicly released on September 14, 2005 and has had five major revisions since.