If you are at all interested in 3D virtual reconstructions and immersive technologies, then you have to check out Microsoft Live Labs’ Photosynth. It is too cool, although it’s not available to the public yet, but the demo videos are amazing. Basically, Photosynth “takes a collection of photos of a place or object, analyzes them for similarities, and displays them in a reconstructed 3-Dimensional space.” The application then allows the user to fly through and explore the reconstructed space or look at the photos in relation to each other. The word is that Photosynth will be available for free, at least at first, but no word yet on an exact release date.
You can see a demo video on the Microsoft Live Labs site here.