Please visit the official site for details.
This is the main Scalathon event: Saturday July 16 & Sunday July 17., 2011.
NOTE: To RSVP for this event, you must become a member of the PHASE Meetup group. (That's a Meetup.com restriction; we have no control over that requirement.)
You're welcome to leave PHASE after the Scalathon, though we hope you'll stick around. (Don't leave before the Scalathon, though; you'll lose your seat, if you do.)