Idea for 3D stereo camera attachment
Using 4 small mirrors I think you could seperate and then combine two images. Here's an ASCII art of my idea:
(top view) [CAMERA]  <- lens / /\ \
So you can see (hopefully) that the two inner mirrors meet at the middle of the camera' lense and combine the images coming in from the two side mirrors. So in the end you get a photo comprised of two side-by-side images about 4 or 5 inches apart....and hopefully would give a 3D effect. (when eye's crossed, of course)
What do you think? Have you seen anything like this before?