An interesting social experiment by Jeff Ragsdale, who went through a difficult break-up last year in 2011. He found himself isolated in NYC and in desperation, put his phone number on a flier along with a simple message to anyone who was interesed: "If anyone wants to talk about anything, call me".
The flier was posted all across NYC and garnered overwhelming responses, with tens of thousands of calls across the U.S and the world. Excerpts from all the conversations, text messages and voice mails were subsequently published into a unique book project Jeff, One Lonely Guy with the aim of creating a global, social and ongoing conversation similar to Postsecret
Here's his story as covered by BBC News