I know that you've asked for camera's other than the GoPro range but I would seriously recommend the 1080p HD Hero.
Initially bought a bullet-cam kit from 4Kam. The quality was poor and the camera itself shook itself to bits within a few sessions. I then bought the GoPro and I have pretty much nothing but praise.
I mount it under the roll hoop on the engine cover of my RF00 using the 3M tape mount. I don't have any problems with vibration degrading the quality; the footage looks brilliant on an HD TV.
The only problem was that at the end of the season, I discovered the mounting brackets on the case had nearly snapped off. This was just a case of getting a £35 replacement case, rather than replacing an expensive camera.
Here's an example of the footage;
http://www.youtube.com/watch?v=2E9BU...el_video_title