Headtracking is a demo based on Johnny Chung Lee’s YouTube video ( https://www.youtube.com/watch?v=Jd3-eiid-Uw ).

Place the Wiimote on your TV facing you and hold the sensorbar close to your head. As you move around, the image will pan and zoom accordingly.

http://www.wiibrew.org/wiki/Homebrew_apps/Headtracking