I know that last time there was a sign up sheet going around for ride sharing up to Drupalcon. At the time, I didn't think I was going, but if anyone still wants to ride share, let me know. I am also considering taking the train.
This is a great chance to meet other Drupal developers and to hear about some of the cool Drupal projects people are working on in the area. No matter what level of Drupaler you are - pro or newbie - come on out to meet others in the community.