I'm using a standard def GoPro and a wide one too. I saw the HD Wide is now available.
The camera itself is one of the best non-professional items you can get (apart from that, you can also use a HD camcorder, but you won't be able to install it everywhere). They will stay on at real high speeds, anywhere you install them.
There will be a remote trigger kit available soon, that will correct the only real problem with these cameras : making sure they are turned ON and filming.
Here's an example of a video a friend did with what we shot during the Classic Days last year :
http://www.youtube.com/watch?v=Sym2vKjZcIgAll in-car footage was shot with Gopros, the inside shots with the wide angle.
