Just as a note for the 'HUD' angle: if you take a small piece of stick-on window film and place it where you'd like to see the image, you'll have greatly improved image quality and good daylight visibility.
If you visit http://hud.cz28.com, you'll see the progress I made with a home-made HUD, and some of the bits I used.
In any instance, it's possible and doable.

Hope you folks get it working. I can recommend the products from www.controlanything.com - they're RS-232 connected VFDs (using a small daughterboard), and you can load your own graphics and fonts. I reversed my fonts and they reflected just fine off of the window/tint combination.

Anyway, just my USD$0.02, adjusted for inflation.

Dan (and since I haven't adjusted my profile in a long time, the correct e-mail address is [email protected])