While this little trick doesn't give nearly as good a result as the storebuilt 3d-monitors do, for the few bucks you'll spend on them it's a nice trick. I've only shown 3d imagery, but in theory it should be possible to create movies and games that work with the simple parralax barrier too.
For your convenience, the links to the webbased stuff I mentioned in the article:
While the scripts behind the web-apps are a bit of a quick hack, I decided to publish them under the GPLv3 anyway. If you want them and aren't offended by badly written code, fetch them here.