Been using the French made Archos 605 personal media player (PMP) for about a month. Just ordered the helmet cam attachment for it.
This device is a portable hard drive with a touch screen, running a wireless WiFi connection to any intenet source.
It records audio & video, exchanges photos, video, podcasts, & .PDF files via a USB, S-Video, Composite, and Component Video cables. It lets you download pay per view movies, etc. from the Archos website, watch cable TV, and tons more fun stuff. An infrared remote control lets you type, scroll, and navigate handily.
It has way more features than I have had a chance to use so far, but the best thing is the high quality LCD display screen. It comes in 3.5", 4.3", and 7" diagonally measured screens. Storage options are SD card slot, 30 gb, 80gb, and 160gb hard disk drive.
The lipstick cam has 420 lines of resolution, and an inline control panel on the wire.