This is an image technology being developed by Microsoft. Sets of consecutive photographs are uploaded to a site, and the software stiches the images into panoramas, while retaining the feel of individual images. In some ways it is like an intreactive version of David Hockneys photo collages. I like the idea of the photosynth in relation to a touch screen, stroking a cat - exporing the photostream with a finger as you walk around the park - a sort of photo direction map with embedded information and things to find. I guess that this is still for the future, but maybe not too far off.
I saw this software being demonstrated a few years ago, with images being drawn from the internet, based on tags and location. In the example it was possible to walk through famous buildings, (it was the Taj Mahal), zoom in on detail, look around, all powered in real time by taking huge numbers of 'random' photographs from the web. Another glimpse of the future.