Alesis VideoTrack consumer POV w/ stereo -- $29.00
 

I just found this deal at B&H.
Alesis VideoTrack Handheld Audio | B&H Photo Video

It's not a micro-size camera, but it's small enough to be POV in some cases. It records 640x480 video including stereo audio. Certainly not for every POV application, but it might serve for some. For $29.00, I'll keep one in the side pouch "just in case."