i use trillian. a very reliable program i suggest everyone who loves instant messaging to get it. It saves having to download AIM onto my computer and still allows me to keep in touch with people who only have AIM as well as going online on different msn and yahoo accounts etc.
Reliable program too...i couldnt recommend it more.
(Realises he sounds like a sales man and a rubbish one at that...lowers his head in shame and climbs into bed)
AIM/ICQ have supposedly joined forces with GTalk now also and will develop interoperability when AIMTriton is in final build (or so i hear) also Gtalk will add buddy icons