I just ordered one of these ($299.99 USD), improved low light capability would be worth it all on its own. But they have all the other performance enhancements. I
bolded some of the important ones to me anyway below. These are some MAJOR capability improvements. Looking forward to checking it out.
It is going for $299.99 as in the case of the original HD camera when it was introduced.
"2X More Powerful in Every Way:
* Professional 11MP Sensor
* 2x Faster Image Processor
* 2X Sharper Glass Lens
* Professional Low Light Performance
* Full 170°, Medium 12°, Narrow 90° FOV in 1080p and 720p Video
* 120 fps WVGA, 60 fps 720p, 48 fps 960p, 30 fps 1080p Video
* Full 170° and Medium 127° FOV Photos
* 10 11MP Photos Per Second Burst
* One 11MP Photo Every 0.5 Sec Time-Lapse Mode
* 3.5mm External Stereo Microphone Input
* Simple Language Based User Interface
* Compatible Wi-Fi BacPac™ and Wi-Fi Remote™
o Long Range Remote Control of up to 50 GoPro Cameras
o Wi-Fi Video/Photo Preview + Playback
o Live Streaming Video + Photos to the Web"
More at:
http://gopro.com/hd-hero2-cameras/