There is supposedly a trailer of Peter Jackson directed JRR Tolkien's The Hobbit, available, which is supposed to be released on December 19th, 2006. Falling for it, I downloaded it using Limewire and can attest it is an excellent hoax, albeit one that somewhat makes you pine for the real thing.
What gives it away as a hoax? There is no mention of the dwarves, only Bilbo, Gollum , Gandalf and two wood elves (who obviously are the ones appearing in lotr and i am assuming they are the wood elves). The Dragon fortunately makes an appearance but the pinkish brown dragon and the accompanying scenes seems to be straight out of Dragonheart.