Some app developer was smart enough to realize that the iPhone's speaker pushes air around, and thus, can be used to move a little styrofoam ball around a fake soccer field.

It's 99 cents, and it looks like a lot of fun. It would be even better if there was some kinda camera/judging thing that lets it automatically know when you've scored.

What else could you use the iPhone for that actually interacts into real space? Maybe something involving screen brightness and night lights? [iTunes via Mobile Crunch]