OK, add Scott Pilgrim vs. The World to my list of films I wanna see this summer. Just watched the trailer, and it looks great. It's a superhero movie (of sorts) based on a comic book, and it's directed and co-written by Edgar Wright, so it's bound to have lots of in-jokes and fan boy movie references. And plenty of nerdiness, because it also has Michael Cera (of Juno fame - love that movie), who must be in his mid-20's by now but still looks about 12!
I've now seen Prince of Persia, and it was pretty good. The dialogue felt a little stilted in places, but you can't fault the action sequences, or the impressive shape Jake is in (there may have been drool). Plus, it has Scary Jeff from Coupling in it (who is almost unrecognisable)!