Anyways, the project-that-cannot-be-named is now named. And its name is cryptotwit.com. It's a game and a website and a facebook app all rolled up in one.
Basically you go to cryptotwit.com (or http://apps.facebook.com/cryptotwit/ in facebook) and you'll be presented with a fairly twitterish "enter something" interface. Write up a cute quote or a message or whatever and press the "create a cryptotwit" button to encrypt it. It'll give you the encrypted message along with a link to the solver-game and a way to post your cryptotwit to your twitter timeline and/or facebook stream.
It's still officially in the testing phase, but since there's no concept of accounts or invitations or anything else, there's little I can do once it gets out. So if you find a bug or something, please please please lemme know.
In the meantime, here are a couple of puzzles I just posted.
a 140-character twitter-length cryptotwit
a longer and hence easier-to-solve (although harder to see) cryptotwit
And, if you don't mind. Please post a cryptotwit to facebook. I need five users before I can submit it to the app directory. Much appreciated.