While I was riding through China and SE Asia, I built my own helmet cam for under $10 and 15 minutes. Here is what it looks like. I have full instructions, details and materials on my website if you want to make one.
http://farm5.static.flickr.com/4071/...393d3fe68f.jpg
http://farm3.static.flickr.com/2620/...aa1ee75ca0.jpg
Stay upright!
