I've just been introduced to Minecraft, which has an anaglyph mode!
![Woot! :woot](./images/smilies/woot.gif)
It's currently a glitchy anaglyph mode, but still nicer than flat-o-vision.
[youtube]http://www.youtube.com/watch?v=FaMTedT6P0I[/youtube]
Now, if only it could have native Z800 support...