http://postsecret.blogspot.com/

For years, this guy Frank Warren has been collecting postcards from people who write in their secrets. (He prefers that people be artistically creative.) It posts every Sunday and there are no archives but he has put out three books in case you want to see more of them.

Here is a radio interview with Frank. (I don't know how long this will be accessible.)

http://www.publicbroadcasting.net/kuer/news.newsmain?action=article&ARTICLE_ID=1057070