Has anyone experimented with stereo photography?

Today I stumbled across the following image:

http://www.flickr.com/photos/ytf/5846267208

It's actually a pair of almost identical images, horizontally offset by a small amount.

The idea is to view the image from two or three feet away, and cross your eyes so that the two images appear as three. If you have the ability to throw your vision like this, within a few moments you'll see one image in 3D.

It's very cool -- to my eyes, at least.

I had heard of stereo photography, but never paid attention to it.

Now I am intrigued. I think I shall read up about it, and I might start experimenting with stereo photography if it's approachable.