ICQ still lives on. Tough, just like The Realm I guess. It's all glitzy and spammy now though. I use Trillian, which offers interoperability with most of the major chat clients, including ICQ.
Annoyingly, during one of ICQ's upgrades, my contact list reverted to UIN numbers (from names) , so I don't even know who most of those ppl are on my list anymore.