I heard about SecretTweet.com the other day and I have to say, it's the most fascinating application of Twitter I've seen so far. Just reading the approved tweets can be a jaw-dropping experience, but then you switch over to the unabridged ones and it's even more incredible. Some of the things people say just make you realize that people have some deep dark secrets lurking inside them. Some that couldn't see the light of day without a service like this.
I'm totally addicted.