Picked up my GoPro Hero2 today and took it out for a quick camera test, Is it 2X better??? have a look at the clips and judge for yourself. It has some cool features and if your in the market for a GoPro I'd go for the Hero2 over the now cheaper HD. The ability to change the field of view to narrow is worth the upgrade, I've yet to test the new 11mp camera but will so in the next few days. I don't see a lot of difference in picture quality, Maybe the colors and light levels are a bit better on the new camera but it's real close.
The clips are unenhanced in anyway, just raw footage from the gopro...
The clip filmed with the original GoPro HD:
The clip filmed with the NEW GoPro HD Hero2: