Bought and tested the Oregon Scientific ATC-1000. Mounted on the turn signal and filmed the commute filtering traffic on the 280 in San Jose. Pretty bad image but a lot of fun to watch. I added a 1GB SD card, 20 minutes will take about 300MB.
http://www.atc1000.com/poison.asp?p=street
http://www.atc1000.com/poison.asp?p=street

but i see these are waterproof to an extent