Homemade Heads Up Display For Bicycling?

An anonymous reader asks: "I am a geek that bicycles in an urban center. After seeing this commercial product, I was interested in the possibility of building a homebrew HUD for a bicycle helmet. I searched the usual places and couldn't find much so I thought I'd ask the readers of Slashdot. A HUD that displays speed, distance, and cadence seems very feasible as many bike computers collect that data. A great longshot would be a range-finder that told you the distance to the object you were turned toward, but I'm not crossing my fingers for that. So what components would be needed to make such a cool device?"

Xybernaut

[AEther141]

Xybernaut [xybernaut.com] sell all sorts of wearable computer gubbins. The MIT Wearables Lab [mit.edu] is a fantastic resource for wearable computing.

This guy used to be famous

[Marxist Hacker 42]

The Guy With The Bike [microship.com] did this back in the 1980s and early 1990s. I believe all of his tech is listed here. About the only thing I think you could add to his design, that has been invented since he gave up this project in favor of an ocean-going mini-trimeran, is a Laser Range Finder [nightvisionweb.com].