Decz said:I used to use trillion, but it started to have complications...
GAIM is another trillian like program. I have been using it for a few weeks now. It has a 'neat and clean' appearence (no advertising windows or popups) and lets you combine MSN/AIM/IRC and a few other Instantant messaging accounts.
http://gaim.sourceforge.net/
So far I am very happy with it. If you are looking for another option besides MSN give it a shot and help support the open source community