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.
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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]