Here's some more information I found online about the trailer / preview before Transformers, currently referred to as "Cloverfield" or "1-18-08". Rumors fly about what the title is. Is it "Monstrous"? "Barbarous"?? "Ferocious"??? J.J. Abrams says it isn't the first one, and Harry says it's "Colossus".
Entertainment Weekly and Guardian Unlimited have jumped into the fray, with the latter pointing to this "Japanese" Drink website that might have clues.