Hi - I can't make it out there this year, but want to invite you to check out my Atari Asteroids fan site. I'm working on making it a resource for other folks who love Asteroids. It's still a little thin when it comes to info and stories about maintaining the machines, but it's got news and a map.
http://www.atariasteroids.net/Also on Facebook:http://www.facebook.com/pages/Atari-Asteroids/178289052227435
And Twitter:
http://twitter.com/#!/atariasteroidsThanks! And have fun!