The letters work great, thats an achievement in itself!  I'll look forward to when you do another one. (even if it isn't sterioscopic)

@Ghostbrain: Thank you very much for the information on 3d Cinema glasses. I doubt I'll be able to get images working with those glasses anytime soon, which is a shame as they are probably more available than the red/cyan glasses.

I think that the letters work okay - but I haven't pulled it of with the actual character which is unfortunate. I've learn't a bit ore about stereoscopic images and I will attempt this again with a more simpler object, as it involves a lot more work to really get it right.

3d cinema glasses work very differently by polarizing images together, whereas red/blue ones filter two images instead.  but yea thanks for givbing me a reason to dig out my old cardboard ones :).