I don't know how long this will be up -- probably not very long, but someone has put up the Coraline 3D preview on YouTube at http://www.youtube.com/watch?v=o63NrCIiYEw. It's filmed from the audience, it's very blurry (because filming 3D is a bad idea) and is probably most interesting to me because every time something 3D happens you can hear the audience go "Whoa" and suchlike noises. But I said I'd link to it if it turned up. Do not blame me if it isn't there any longer.