Any good guitar exercise apps?

[I've got it!]

So there's this really good website called GuitarCardio.com that I've been going to for months now. I just got an iPod Touch and thought, "Wow, it would be totally radical if Guitar Cardio had an app!" Well . . . they don't. So I was wondering if anyone knew of any apps that provide finger exercises, etc. for guitar practice. Sure, there's lots of stuff for beginners, but I already know how to make an Am7 anywhere on the guitar, let alone in open position, so those are of no use to me.

Any help is appreciated. Thanks!