It's been a while since I've seen a trailer that made my inner geek this happy.
Scott Pilgrim vs The World
From director Edgar Wright, he who directed Shaun of The Dead and Hot Fuzz - movies so pregnant with cultural allusions they could be episodes of The Simpsons.
[I can't embed it because Apple/Universal don't like things to spread, apparently.]I was also pleased to know that is was based on a comic book, which was inspired by a song, and that it is being made into a game.
I found this out because I couldn't find it on youtube, but found a bunch of other stuff about Scott Pilgrim instead.
[So - thanks Apple/Universal!]