The weekend prior to DEMO Fall, the Startup Weekend organization held a "mega" event like none they had ever done before. Sponsored by DEMO, StartupAmerica, Microsoft, and several others, it was held nearby at the Mountain View Microsoft campus. Here's a cool two-minute video that was shown on Day 2 of DEMO Fall, followed by an onstage talk from the winner, AdGame.

And here's a story later published on VentureBeat (by Dylan Tweney):

AdGame goes from zero to startup hero in one week.