Julianne and I will be there, on behalf of Authoring Tools Framework and LevelEditor. Pat, the main programmer working on SLED, will be there. We'll be handing out invitations at the Sony booth at the GDC Expo, so we hope to get a good group of games tools programmers there.
Here is the invitation and map. Please RSVP if you can attend:
http://www.meetup.com/San-Francisco-Game-Design-Meetup/events/220589729/