Most wearable computers we've seen feature a head-mounted display tethered to a small PC system in a backpack or worn on a belt. Here's a slick little system that does away with the cord, fitting the entire system in the glasses.
Pascal's own design, created for less than $1,000 total in parts, the result is a spatially aware six ounce computer, with display and battery and all, that fits neatly over the bridge of one's nose.
It's a fantastic hack and a nicely documented project, though even the device's creator himself questions whether having a pair of microwave transceivers and a LiPo battery strapped directly over one's eyes and brain is such a good idea.