Geotagging and geophotosearching have taken off considerably since Flickr's new maps integration (which if you haven't seen, stop what you're doing and go play with it.)
At first I thought the maps interface was more about finding pictures in general by location; However, my eyes were quickly opened after reading though the comments on the FlickrBlog's post: "Geotagging - one day later." Some of the links posted are amazing... Like this one:
Apparently zombies are found along country borders rather then the interiors...