We’ve been covering on this blog the intersection between politics and user-generated video, most often by posting some of the better campaign mash-ups that have been posted to YouTube this season. But now, however, anyone (well, any Obama supporter) can go legit with their political ad by taking part in “Obama in 30 Seconds.” The contest is being sponsored by MoveOn.org, and it assembles an incredible panel of judges (Ben Affleck, Matt Damon, Lawrence Lessig, James Schamus, Ted Hope, Russell Simmons, Oliver Stone, Moby, Tom Ortenberg, John Legend and DJ Spooky are a few) to pick the best submitted Obama 30-second spot. The winner receives national exposure for his or her ad, a $20,000 gift certificate towards video equipment, and, of course, the civic benefits of political engagement.

The message from Move On is embedded below.