I remember Punch-Out, the arcade version of the new iPhone game Punch-O-Meter. I remember pushing lots of quarters to try to hit the pad harder than your buddies. One guy demolished us and this earned the moniker "Eee San Joe" (139 in Chinese Mandarin) - he was never defeated and I'm pretty sure we have some old pictures to prove it. Regardless, I would hate to see people flinging their $300+ iPhones (not including data plans) around trying to out punch your friends.
I've posted before about the many mobile devices out there that are taking advantage of the onboard accelerometers including the drum stick KDDI phone, Sony Game Phone, iPhone, and iPod Touch. I predict at least another dozen iPhone apps coming out next year alone and more if you include the other mobile devices.
And here is the rest of it.