A couple of my Flickr photos are being used by Schmap, a map guide to the world's major cities:
It's nice to see that use of Flickr's groups and tags have added a bit of visibility to my photos. It also serves a useful reminder as to why people go to the effort of tagging photos - I took just over 600 hundred photos on my last visit to England, and tagging them is even more daunting a task than processing them, but no less important.