It's amazing what you can get if you show a bit of interest. Simon Harriyott had spoken with the guys at Flickr about machinetags in connection with our http://openplaques.org/ project and now we have an official Flickr machinetag. Read about it on the Flickr Dev blog.
What this means is that if any photos of plaques are tagged with openplaques:id=243 then we can pull metadata like the geographical position (if it's been placed on a Flickr map) and now a little link back to the openplaques.org site will be displayed.
Here's an example Flickr photo….
Here's a closeup of the machinetag link…