For those interested in knitting or Neil Gaiman.
(The key is “sweaterxxs.”)
Update: Here are some more keys. “moustachio” is my favorite of the bunch, though it has nothing directly to do with the movie.
buttoneyes
stopmotion
moustachio
puppetlove
armpithair
Update II: Here’s the trailer.
Thanks for saving me the trouble of Googling more keys — something I hadn’t yet found time to do. Now that I do have a few minutes, I located this interesting account of how the keys are being distributed as part of a viral PR campaign: http://www.despoiler.org/2008/11/17/my-funny-coraline/