I'm on irc still.. but i've cut down on all the channels I used to hang around in, and now I'm basically only in #motorcycles on EFNet, where IRC is alive and well. Topics range from rebuilding carburetors to the innards of Erlang.
Huh, I'll have to drop in. I didn't realize efnet had an active #motorcycles channel. I'm in one on freenode and one on snoonet, though.