Cool AMB! I had the same thought. I tried it as a head light. Made the bracket out of a piece of flat stock alum, a drill and 2 bolts. Not bright enough to see but let cars know I am there. That and my bracket vibed so much it looked like a strobe, lol.
Perfect for a tail light and "my zone" I still have some in the box and am going to try your idea. Mine are white so gonna find some red plastic or maybe sheet...
First post has pics; http://motorbicycling.com/f3/solar-head-light-1853.html
I bought a multi voltage solar charger at HF for 6 bucks and am going to try a 6V system using a wally world kids electric car batt. I want tunes, GPS and a cig lighter, snork