People want and need to confess.
This morning on NPR was a story about the site Post Secrets.com in which people mail the creator a postcard with a confession on it. It's an interactive artistic project of the creator. The postcards are depicted on his site in the form of - everyone - a blog.
A forerunner of this is GroupHug.us, albeit more prurient, it's an online confessional. There are others, but these seem to be the most buzzworthy. I don't know the traffic of Post Secrets, but Group Hug is currently up to ~22K visitors per day with an average of 4 page views per visit. That's some heavy online loitering.
They're both undeniably creative efforts.
Know of any other anonymous disclosure sites? Leave 'em in the comments.