Peanut Butter goes down smooth at Yahoo!
The most interesting thing about the "leaked" Peanut Butter memo is that it's probably generated some of the most positive publicity Yahoo! has had in a while.
Eventually when Information Rights Management matures as a strategic priority inside companies people will be able to make it incredibly difficult to pass on such information to unauthorised third parties. Just like Mission: Impossible (The TV show not the couch jumping movies), your content will have the ability to self destruct.
Though I'm sure we'll all still wink at the camera when high level memos, usually seen only by senior executives, "leak" to the press. ;)