I've been looking for a small, lightweight digital camera module for a long time that you can interface easily to something like a gumstix. I finally found one that meets my specific needs:
- small (entire board is 20mm x 28mm)
- low power (60 mA at 3.3 volts)
- simple interface (TTL serial at up to 115Kbaud*)
- sends picture data in a well-known format (JPEG)
The C328-7640 module is actually capable of going up to 921Kbaud, although the documentation doesn't mention that.http://www.electronics123.com/s.nl/it.A/id.2027/.f?sc=8&category=241
The fact that it costs under $50 is a huge win, and it is incredibly configurable with respect to what you get back (image size, bit depth, format, etc).
I'm going to get one of these, interface it to my gumstix, and use it on the head of my Bioloid raptor.