Flickr®, associates them with Bing Maps Streetside photos and then overlays them by stretching the photo to form fit where in the world it belongs. The new application called Streetside Photos is currently available in Seattle, San Francisco and Vancouver (Canada) to view your Flickr photos in a whole new way. We gave it a spin this morning and captured the video below, it has huge potential to view historic photos and crowd source the latest imagery.
Note how the 3D transitions between scenes and how the photos become part of the panorama:
See the post over on the Microsoft site for full details on Streetside or jump direct to the Streetside Photos application.