Okay, this is one really cool app from microsoft labs. It’s called Photosynth and it creates a sort of 3d node cloud from a set of pictures that document a location.  It analyzes them, builds the pseudo 3d cloud and then links the pictures to it. This gives you the ability to navigate through the space while not requiring a full blown 3d environment. Giving the user enough info that our brains fill in the rest. It really allows you to quickly move around the space. Pretty amazing.