This is the venue that brought us the famous "boxers or briefs" question for President Clinton, but when you're going for the youth vote, you still need to make an appearance. Obama discovered in 2008 just how non-threatening this venue is.
MTV is taking questions for the president on Facebook, and will interview him on Friday. Romney has been invited too, but declined--just as he declined to be interviewed for Nickelodeon. McCain also declined in 2008.
I think it's safe to say that the Republicans are writing off the youth vote.