I've been maintaining a Google Calendar for upcoming Lisp-related user meetings. In the past month, several people have said it helped them find meetings, so I'd like to make it a little more visible.
To that end, I've added a sidebar to Planet Lisp that shows a list of meetings scheduled in the next 30 days. It's updated daily.
I've also created a new twitter account, @lispmeetings, that will post a tweet about a meeting the day before it happens.
If you want to see an upcoming Lisp meeting on the calendar, please email me and I'll put it up.