A Taiwanese software company sells a Direct 3D filter which turns all your 2D movie content into 3D. Yes, it does work. Download the free trial and give it a go.
Apparently it integrates neatly with Windows media Player, although I use it with Stereoscopic Player 1.7.1.
Documentaries such as the Canadian "Jetstream", following CF/A-18 training becomes thrill-a-minute. In the BFM footage you feel as if you're right there, turning and burning. Animated features prove to have startling and satisfying 3D qualities. The Justice League Unlimited Season 2 'Flash and Substance' episode gave a real sense of the Flash's speed. Narrgh, words don't do it 'justice'. Get hold of it and try it for yourself.