Post-Secret--What's the secret?

No doubt some of you have heard of "Postsecret" the web site (and book) where people supposedly send postcards in with a secret written on one side. Although I have some very strong reservations about the veracity of these things, there's no doubt it has proven an interesting creative outlet...in other words, there seems to be something interesting going on here with both the combination of visuals/text (the art) and the anonymity of posting them online. Have a look and see what you think.