Had to run around today so took the 500 and decided to play around with the gopro as well.
Still not all that keen on some of the mounting hardware, but you can't complain about the quality. After using camcorders before in the car, the major difference with the gopro is that the wide angle lens seems to make things look faster than they actually are.

Oh and in the video I'm using the word Spin to mean a trip out, rather than throwing it off the road.

[ame="http://www.youtube.com/watch?v=Nzdk0nmVqx4"]A spin in the 500 Dualogic in the rain. - YouTube[/ame]