Flickr has just launched The Commons, a pilot project where they have partnered with The Library of Congress to provide an place where people can help tag public photo collections, thereby making the collections easier to search and use. Here is the announcement from The Library of Congress.
There are two main aims to The Commons project, starting with the pilot: firstly, to increase exposure to the amazing content currently held in the public collections of civic institutions around the world, and secondly, to facilitate the collection of general knowledge about these collections, with the hope that this information can feed back into the catalogues, making them richer and easier to search.
There are some really interesting photos in there, so start viewing and tagging!
photo from the News in the 1910s collection