Joe, Barry, ENTS,
You can take stereo photographs with a single digital camera
provided that the subject is not moving. Here are some sites that
talk about the process:
Making your own 3M Photos
I presently use four methods to generate 3D images of the real
world. I refer to the real world to differentiate from computer
generated 3D, such as ray traced images. The four methods I employ
utilize a standard camera, a video camera, a scanner, and a QX3 USB
Digital Stereo Photography
The art and science of twin camera digital stereo photography.
This site features digital stereo photographic pairs, along with
practical details for creating your own digital stereo photographs:
techniques, cameras, controllers, flash, sync monitors, and mounts.
There are quite a few more sites on the web that talks about 3D
photos and even a 3D forum.