madburn writes "MacInTouch has a blurb about a device from Boost Technology called the Tracer. It appears to be an almost-affordable head-mounted "mouse" with the features and performance needed for serious use, including 360-degree field of view. It supports USB and PS/2. I wonder if this will make the Quake experience more immersive?"
The girl in the picture looks kinda stoned, but I can imagine that this could be useful for the handicapped, and fun for someone looking for a different input device.