A "source" has just shunted in the direction of Wii jOG, a motion-sensing controller that mirrors your steps on-screen.
Updates:
It's a pedometer device that counts your steps as you jog on the spot whilst playing games. Thanks, http://www.nintendowiifanboy.com/2008/07/14/wii-jog-the-stuff-of-our-nightmares-just-might-work-though/
