Nintendo Wii devotees are likely already familiar with Johnny Chung Lee as the guy who appeared one day last year on YouTube with a mind-bender of a demo on how to use the Wii remote and sensor bar to do head tracking. By placing the Wii remote at the base of a TV and attaching the sensor bar to a pair of glasses (and in conjunction with a bit of custom software), Lee made the three-dimensional images on screen respond to his position in space, appearing to float off in front of the screen. As it turns out, Lee is more than just a guy with a knack for understanding the Wii remote; he's currently a graduate Ph.D. candidate in the Human-Computer Interaction Institute at Carnegie Mellon University. And he's so impressed the gaming world with his developments that EA is bringing a Wii game to market this spring with a head tracking Easter egg.