Jeanne Storck's tinywindows is a wonderful source for information and critical writing about "found" photographs. Check out THIS post. Storck writes: "We tend to think of found photos as existing solely in the physical world, pieces of paper from the past covered with chemical emulsion and unknown faces, but the Internet opens up a whole new universe of vernacular photography where the images are less tangible, more ephemeral and free from the bonds of ownership. It’s a vast community-owned pool of images." Yes. YES. Go read tinywindows. You'll be glad you did. If I can't remember how I found some interesting photography site, there is a good chance I found it at tinywindows.