I picked up a Polaroid PDC640 (or was it 6400?) for less than $180.  I
have had it take pictures via control of a script running under Linux.
It's not megapixel but takes great shots for the web.

Peter Keller wrote:

> Hi
> I'm look for a lowcost handheld digital camera with a serial port for
> controlling the shutter and downloading xxx.jpg files.
> I want to automatically take pictures and store the files to a bank of
> 16 serial eeproms. the new picture will erase the oldest.
> Any idea ?
> Peter