Meebo is a new web-based IM client, developed with AJAX. The system integrating the core of GAIM 1.5 with AJAX. Nice work for all of them.
Meebo allows user to login to most popular IM provider. There are Yahoo Messenger, AIM or ICQ, Jabber or GTalk and MSN Messenger. They claims that users password were encrypted using 1024-bit RSA keys. I hope they do..
You should have a try.