Hoffman changed his plans at the last moment, and did not release the source code to Jikto at Shmoocon because it would be put to abuse almost immediately. When interviewed later, Hoffman was quoted as saying "I'm not that smart a guy. If I'm talking about it at a conference, you better believe somebody else has figured it out. Those people have not told people about it."
Given some of the stuff I've heard coming out of Europe lately, I'm inclined to think that he's right.