@Cowabanga: I don't think he's asking for a glass shader.

You're asking for a code that would allow you to see your game in 3D with blue/red-glasses? The so called anaglyph-effect.

I think Slin (a forum member) is working on something like this, but I don't think he has released anything yet.

I have those very old ELSA Revelator Glasses somewhere and I know that they needed a special driver from nvidia to work and if I remember right you could choose the output to be blue/red instead of using the shutter effect.
Worth a try I think...