Walrus1, right now a cheap Emerson $40 camera.
http://www.amazon.com/Southern-Telec...n+video+camera
I held off on a gopro for right now. Video wise, the camera is okay and with post-editing via Virtual Dub, not bad at all. Playing around with it, I can get license plate numbers on a lot of cars although that's not my purpose, if I use the so-called HD mode. However, something rattles inside the camera that makes like a captain crunch noise when the bicycle is in motion or even just shaking it in my hand. I was able to get about 100 minutes of video in regular mode before it died on batteries. Using it on a dirt road with the bike mount is too shaky to be useful.
The bicycle mount with that cheap camera is outstanding, fits nice. Using it on the helmet feels weird to me though, maybe it's just too heavy for that purpose. I'll upload a few minutes of riding within the next day or two.