Catching up on news: NTT DoCoMo unveiled the official mobile phone game of the 2008 Olympics at the Tokyo Game Show 2007 in September:

"In one of the game's events, you put the phone down on a table and pump your arms like a sprinting runner. The phone's camera picks up your movements and accelerates your onscreen running character accordingly."

Unfortunately I have been unable to find more information on the game.

Thanks to Jason Tester for the link. Original short post at picturephoning.