Jon! I never knew PIXAR made one of these, that's awesome. I have seen a 3D zoetrope before in person, it was at an exhibition of 'screen worlds' at gallery my friend and I went to earlier this year. We walked into the dark room and nothing was happening, we didn't know what it was and then suddenly this thing in front of us started moving, it gave me a heart attack at first but then I was mesmorised by it.
Here's the one I saw in Melbourne. They really are amazing things to see, and it was just me and my friend there. Although I must say after a while the strobe lighting got to me, it hurt my eyes but at the same time I couldnt tear them away.
Anyway thanks for posting the PIXAR one, like I said I never knew they did one. Do you know where it is stationed?