http://www.meetup.com http://www.meetup.com is an obvious one. Another cool one is http://www.plancast.com http://www.plancast.com. This allows you to see what

http://www.meetup.com http://www.meetup.com is an obvious one. Another cool one is http://www.plancast.com http://www.plancast.com. This allows you to see what meetups people in your network are going to.