DIY Augmented Reality Windshield HUD

casey mentioned that he wants to investigate augmented reality. Having played with the accelerometers on my M200, I'm leary of the challenge of maintaining orientation over many integrations in a handheld or head-mounted device. On a car, though, you can auto-orient using the GPS and a roadmap and there'd be generally more slop for output angles. Finally, I imagine the hardware for painting a display on a windshield would be easier to build yourself than the hardware for painting a display on the inside of a pair of glasses.

This guy's even done all the work.

I have zero competence in hardware, though. Sigh. I was a charter subscriber to Make: maybe in another couple years I'll work my way through their primers...