I found a couple of photo sites that captured my eye:
Riya – This site lets you upload photos (like a lot of sites do), but Riya is special, because it allows you (as well as your friends) to annotate the photos, including identifying people and things in the photos. You can then search for these annotations. This is a great example of the emerging world of user-entered metadata, where people that don’t know anything about classification can help enter additional information about a particular thing simply by providing straightforward feedback about it in the interface in which they view it.
Border Film Project – These folks gave Minutemen militia members, as well as illegal immigrants trying to cross the border, disposable cameras and asked them to take photos with them and turn in them. (Click on the “B” in the home page to view the photos.) I found the Similarities page particularly interesting, considering none of these people knew that the other group was taking similar photos. Regardless which side of the ideological fence you stand, this was a really good idea, and I hope that other groups in conflict will be asked to do a similar thing.