I have one of the cameras that CS linked to, It's an impressive little bit of kit.
On the supplied 2GB MicroSD card, it will record about 1h:20 ish, depending on what it's looking at.
The battery isn't flat after this, but I've not tested it with a bigger card yet.
It splits the files into 30 minute chunks of 700-odd MB each.
If you wanted to extend runtime with say an 8GB card (or swap cards and carry on recording), it will record with 5v fed into the USB socket. I have tested it with one of those "emergency phone charger" gadgets that use a DC-DC converter to pull 5V from an AA cell, as well as a phillips USB power pack.
It will shoot through a ~2mm hole in a thick shirt pocket with some vignetting, and sound is remarkably good for the tiny little mic that's in it - clearly audible in a meeting situation for example.
With a little TLC and perhaps a compressor in your NLE, it could be improved too.
I think the sensor is a CMOS, as it does suffer from shear, but for the price and size, IMHO you can't complain.
Drop me a PM if you want a sample file.