Apparently a hacker, calling himself BtCB, posted the decryption key on freedom-to-tinker.com in the form of a decryption key of a small haiku. Needless to say, the freedom-to-whatever site is currently unreachable.
The post dates back to May 23rd, so it seems it didn't take him long, just a day in fact. We all know about the cease and desist mess which came about last time this happened. Nevertheless, MKBv3 is no more.