I saw a video of Photosynth, from Microsoft Research, a while ago but couldn't for the life of me remember the product name! So when I was talking to some people about how Photosynth will crawl the web and find photo's similar to yours so that it can create a 3D space out of them, I was lacking in credibility as I couldn't back myself up!

Anyway, you can watch a demonstration here ... the mind boggles!