i think meebo may work. I'm not sure at all actually. i use it to use AIm and YIM at the same time so...
meebo.com
Lol you just got four strait up votes for meebo lol.
Well there is:
webmessenger.msn.com
www.ebuddy.com
www.iloveim.com
www.e-messenger.net
That should be enough?
Tuffie.