Have you thought about just pointing the camera out of the window direct? I got some really good resuts doing that, you can download my Monaco F1 Lap from here (19Mb new version of Quicktime required I think).

I used a Hague Camcorder Suction Mount model SM1 in that clip. I am lucky as the Smart has a glass roof so I was able to get some nice shots from both inside and outside the car.

What are you planning to use the footage for? I did 10 laps of the F1 track at Monaco to get that one "Fast Lap" if you watch each lap back it's really really boring TV, but you can edit it into something quite amusing, so being able to change the shot angle really helps.

If you do go with the Bullet Cam idea, RF concepts are the guys to go with. I have one I used to use on the RC Heli, they sell some really good Sony CCD ones that are built to last with all the vibrations etc... There is a Helmet Cam section on their website that lists the best ones for the job.

Let us see your results

Cheers

Cris.