This photographer, Michal Daniel, has an excellent site, 640x480.net, of street photography taken with a camera attachment on an old PDA. Some of the photos are really great (but some are a little too sneaky for my tastes). It's cool to see someone using "obsolete" technology to make serious art (I can't think of a synonym...), and it proves the brain behind the the camera [or PDA!] is more important in many ways than the light-tight box capturing the image.
The gallery could use some editing, but it's impressive to see so many good moments that he's caught over the course of a few years. Well worth paging through the thumbnails.