I've purchased one of these helmet video camera from Oregon Scientific:
ATC2K Waterproof Action Camera
I also bought a 2 GB SD memory card at the same time for $70. That way it was
already formatted to FAT (or FAT-16) while most SD cards are formatted for
FAT-32.
You can find a review of this camera here from Helmet Cam Central. You can purchase the camera for a little less ($120)from
REI here. Pictures here
and here. You'll find a previous discussion of helmet cams here.
Mounts easily on helmets, handlebars, and other sports equipment
640 x 480 VGA resolution at 30 frames per second
USB and RCA cables included for easy playback on PC or TV (NTSC)
SD card expansion up to 2GB – onboard memory is 32MB
Operates with 2 AA batteries, not included
AVI format on your computer.
Small, inexpensive, solid-state / crash proof, removeable media, 30 fps, product
manual addresses helmet cam issues, NO WIRES!, good design, USB 2.0 support.
A minute version of a ride on my bicycle through the streets in
Cathedral City, Rancho Mirage, and Palm Desert, up highway 74 toward Vista
Point. The point here is to show what the camera does just hooked to the handle
bars, not the helmet. This is the compressed version: