Interesting project at Microsoft to “explore photo collections in 3D.” Program can scan personal photos or even photos shared on the web to build a navigable 3D space. One of the coolest things I’ve seen in a while!
http://research.microsoft.com/IVM/PhotoTours/
Make sure you watch the video demo!
http://research.microsoft.com/IVM/PhotoTours/PhotoTourismFull.wmv