This is really cool: invite people to send you a 4 x 6 card containing a "confession," then post the responses on a blog. People invest lots of time making art that they give to you for free. It's not all good art: lots of it sports a coffeeshoppy hipster graphic theme, and lots of the text is 10% confession and 90% punch line. Still and all, this is pretty much the essence of the modern blog: a stage-whisper.
Postsecret (as seen in the New York Times)