ICQ killed ICQ
Sad but true and I do still remember the days of everyone chatting on ICQ! It was the place to be.
But Microsoft *please* listen up before your IM program heads to the graveyard - try and improve the stability when sending/receiving messages. Far too often I'm trying to chat to someone and they just don't get the message and you don't get any notice of it.
And thats with the person sitting right across the room from me. So I've moved over to AIM now as it's much more reliable. Fix your issues and I'll be back!