DBpedia concepts with corresponding photo collections from Christian Becker's Flickr Wrappr are now accessable by following the dbpedia:hasPictureCollection property. This means an additional 30-50 million photos are accessible through DBpedia.
For each of the 1.95 million DBpedia concepts, Flickr Wrappr generates a collection of Flickr photos that depict the concept. The DBpedia project never ceases to amaze me! Check out their entry for examples and more information.