So the iPod Touch and the iPhone have an accelerometer in it. They use it to detect when you tilt the device sideways and it will auto rotate your photos or whatever with it.
What a waste! This thing is ridiculously accurate! With a hacked OS, you can load up 3rd party apps. There is a game that turns your iPod into a Labyrinth! The accelerometer is so accurate you can turn your iPod into a level, or steer a car in a driving game!
So give Apple this great sensory input, and what do they do? Allow you to tilt your photos? Lame!