Doug Engelbart, prepare to be usurped by the Fraunhofer Institute for Industrial Engineering. Yes, the folks that brought you the MP3 and the Multimedia Dome are now working on the Eye-Controlled Interaction system -- a way to control a computer GUI just by staring at it the right way, possibly rendering the mouse a quaint invention of 20th century computing.
http://www.engadget.com/2006/10/03/eye-controlled-interaction-for-your-gui-coming-soon/