We've done the postcard poem--one friend of mine even had a postcard poem exchange for her middle school students and ASU graduate poetry students for National Poetry Month one year. This is a whole different "art" exchange:
The idea is that people post postcard sized images with a secret on them. They range from the cliche and self-absorbed, to the political, to the funny, to the incredibly sad.
While I normally wouldn't suggest stealing people's stories (well, maybe I would) the nature of this project is that the contributors are offering up these secrets to be art, to be a part of collaborative art. I think some of them would make great poetry or fiction premises.
Thanks to PostSecret for creating a forum where people can share these things about themselves.