DebianIRC
Drop by irc.debian.org, channel #lisp some time. There's some fun folks doing cool lisp hacks at all hours of the day and night.
Check out clog's daily logs over http://tunes.org/~nef/logs/lisp/

Note that this channel is not in active use anymore. The #lisp channel is on Freenode (irc.freenode.net), and the logs linked to above are also of #lisp on Freenode. The irc.debian.org domain, until June 2006, pointed at Freenode. Since then it has pointed to irc.oftc.net but the #lisp channel is on Freenode.

See also IRC