I found this site in Enroute magazine, the inflight mag of Air Canada on the way home from Regina. (Am I the only one who actually takes them up on the “free for you to take” offer? It’s a very well done Magalog, considering it’s readership and billigualism.)
The idea is you send a postcard to an actual address, confessing your secret, they scan and post them online. Creative and somewhat touching, the collection has been a book and now a gallery show. The web strikes again!