Chris: I don't often get carried away by a Microsoft product, especially one that isn't even at the beta stage yet, but I've just spent quite a while this evening playing with the preview of something called Photosynth. Imagine taking a set of photos from Flickr, building a data set of points in the physical space, and then letting you navigate that 3D space seeing the photos mapped on to it, all zoomable in high pixel count goodness... It's difficult to explain hpw cool this is without seeing it, so why not watch Blaise Aguera y Arcas demonstrate Photosynth at TED instead?