Glasses-mounted display. Which is connected to a 1GHz Beagle Board, powered by batteries to make it mobile. Man, that's cool.
I thought about linking the image, but I'm not seeing "Creative Commons" anywhere on there.
Following the links to the guy's current blog, I saw that it's relatively simple to solder on an RCA cable, which makes the composite link to the myvu glasses. I'm thinking you could get readable console mode with that, which is good. Wouldn't want to try a windowed interface.