Come share, learn, network, and g33k out with other Drupal and Open Source fans. if you're interested in open source (beyond Drupal), this is a great opportunity to learn from others and to share what you know about Drupal. The LA Drupal crew is going to have a booth, and they'd welcome anyone who is interested in joining them.
It's a great networking and learning opportunity's all around. The entrance fee is either $10 or $70, much less than something like Drupalcon.
If you're interested, the planning wiki is here, http://groups.drupal.org/node/46864. From Mike Stewart:
Send / Show them the wiki - it'll have the latest info. We have about 10 people signed up - typically there are a few that flake out - but I still think we've got it covered. However, if someone from SD wants to come to the show, have them hit me up. Good chance we can squeeze them in if they're serious and want to hang with some of the LA crew - not to mention be involved in a great local open source event. It's a truly amazing event for open source!