Trillian 0.725 is a very sweet solution for those of us who juggle 2 or more IM accounts all the time. This unified messenger has come a long way since early versions (which had some major bugs, including problems with the "away" detection.) I spent a lot of time at work examining instant messenger design, and for a multi-headed client this is definitely the best I've seen so far.
My only complaint: they ignored Jabber, which merits inclusion if not for popularity, then for it's open standard/network stance. Still, it's not something that 99% of users will notice.
