PostSecret is an incredible blog project that I recently discovered:
PostSecret is an ongoing community art project. People from around the world share their secrets anonymously on one side of a homemade postcard. If you would like to mail in your secret(s) too, scroll down to the bottom of this page for directions.
It's easy to spend an hour getting lost in these fragments of lives. It reminds me of the Apology Project that came up in This American Life.
If you liked PostSecret, you should also try out GroupHug, it's also the same type of mass confessional:
http://grouphug.us/