Democracy in action, yeah!
Some people have called into question CNN's decision of selecting the questions that will be asked. But others ultimately think the debate is important. I suppose you need some vetting to ensure the wisdom of the crowds doesn't select an evolution of dance video, but the debate likely loses some luster if CNN makes the final call. Those who care about the Web movement or politics will tune in regardless.
From the NYT
People have sent in more than 2,000 online videos to YouTube.com, where they are posted.