I just found Trillian today

[Hokie]

This a great little program. It works with all the popular IM programs. Now I can have AIM and Yahoo IM contacts in one window.

http://www.trillian.cc/learn/

[Caution]

1. Try gaim, it's better and open source

http://gaim.sourceforge.net

[Hokie]

2. I will give it a try

Does GAIM combine buddy lists like Trillian does? Trillian does not allow you to start audio conferences on Yahoo (at least in the free version).

[Hokie]

3. No Voice Support?

That is a deal breaker for me with GAIM.

[Caution]

4. Not sure on the voice thing

I have no idea if that is supported or intended to be supported. sorry.

yes it does allow for combined buddy lists across most of the IM protocols out there (AIM/ICQ/Yahoo/MSN/Jabber/etc). There is also a tabbed chat window (sort of like tabbed browsing in firefox) this keeps all of your chats in a single nice neat window rather than 30 chats = 30 windows.

Sorry abotu the voice thing i just dont know the answer. You may wish to try emailing the authors (they have been pretty responsive to me in the past)