The HackHD camera is an excellent 1080p video camera using a 9MP sensor that can also take still images. It weighs only one ounce and is approximately 1x3 inches in size. The camera can easily be mounted virtually anywhere, and can even fit inside of the GoPro skeleton. It is powered by any 3.7-5 volt power source.
Here is a video from Edge Research Laboratory using this camera on a high altitude balloon.
Resolution: 1080P HD Video / 5MP or 9MP Still Photo
Frame Rate: 30 FPS (frames per second) Video
Aspect Ratio: 16:9
File Format: AVI Video / JPG Photo
Storage: External microSD or microSDXC card (Supports SDHC cards with adapter)
Control Input: Single contact monetarily switch
Video Output: Composite video 480P resolution
Status Indicator Output: Single color LED driver
Power Supply: External 3.7V, 1100mAH minimum. 5V safe.
Low battery procedure: 3.6V indicates low battery by faster LED blinking, 3.4V stops recording/turns off