This DIY ad campaign, “Obama in 30 Seconds,” with the winner getting guaranteed national rotation and some free loot, seems like both a very good and very bad idea at the same time — the latter mainly because of the loons it will bring out. I was swayed a bit, however, by looking at some of the entries for the previous contest from 2004, “Bush in 30 Seconds” — especially the winner, which is thoughtfully restrained. The submission period runs March 27 through April 1 (a bad end deadline), and in addition to first-round online voting, final entries will be judged by an intriguing 24-person panel that includes Ben Affleck, Moby, Matt Damon, Naomi Wolf, Julia Stiles, Eddie Vedder, Oliver Stone, Jesse Jackson and Ted Hope. So have at it, all you politically agitated aspirant filmmakers. One question, though — whither the DIY John McCain ad campaign?