Have you seen Post Secret? It's a site for a project by Frank Warren, who started it by handing out blank postcards that people could put their secrets on and then send to him. It has grown into a community art project with thousands of postcards.
He has the website, has put out a few books of the postcards, and tours with some of the cards. Some are funny, some are sad and some are thought provoking. They update the website Sunday mornings.