Sony's black action cam is on sale for $99. I have the white one and love it. I think this is the same one Nick V. uses. These have a stereo mic that gives way better sound quality than a Gopro.
http://store.sony.com/compact-pov-ac...pfm%3Dcategory
http://store.sony.com/compact-pov-ac...pfm%3Dcategory