Picked up a GoPro 2 the other day. I also have the original GoPro so I thought I'd put them both head-to-head on a quick drive through town. The camera has been improved in many ways including an option to shoot 120fps video, but the most important part is video quality. It could be better, but I think it's a pretty nice step up overall.
Set it to 720p or higher to see the difference in quality between the 2.
The sound gets a bit weird at times because I set the left camera audio as the left channel audio and the right as right. Thought it would create a nice stereo sound, but I think the videos are milliseconds out of sync which causes some strange sounds from the wind.