This may be a repost, but I managed to source a helmet cam for less than $20 from Australia eBay (1$ plus $16 shipping).
check this link:
http://cgi.ebay.com.au/Red-Mini-DV-D...item5ade903878
Or do a search for "M80 mini DV" There are even YouTube videos showing you how to set them up in your helmet, and videos taken by them. More expensive ($60) are also avaialable called AAE or AEE I think - but its the same thing.
And they are actually pretty good quality video at 720x480 pixels (2 Mp) and 30 frames per second.
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