Stereo views use to be the big thing back in the days before electricity and TV's. I have a friend who makes a lot of stereo cards and sells them at art fairs. He even received a grant from the state to go around to historical places and create stereo views of them. He has a 2-camera rig that he uses to capture his images at the same time so he doesn't have to worry about the subject moving between photos. He also creates 3-D images where you use the red/green classes to look at prints. Pretty cool stuff.