Greetings from Charleston, where Democrats meet tonight in a debate co-sponsored by YouTube and CNN. Oh, and the Democratic Party, too. There’s a lot of talk about how different from previous debates this one will be, as the candidates respond to questions posed via video from YouTube users (and selected by CNN). The talk here is that there will be a number of questions intended to throw the candidates off their game, to see how they react. YouTube founders Steve Chen and Chad Hurley had lunch with a group of reporters today, and Chen said he wouldn’t want to be on the receiving end of some of the questions. “But they don’t have a choice,” he said of the candidates. There is a division of opinion about whether all this is gimmicky or revolutionary, but with debate fatigue setting in six months before the Iowa caucuses, politicos are willing to try new things. So here goes. Republicans, by the way, are having their own YouTube affair on September 17 in Florida.