Flickrtics

Thanks to Jason Schultz, fair use not only has a posse, it has a Flickr group:

A place to post photos where you are not the copyright holder of the photo or imagery in the photo but still genuinely believe it to be a fair use, e.g., a personal non-commercial use, an artistic transformative use, or for purposes of parody/commentary/criticism. (There are many other forms of fair use but those are the most common).