Not anime, but worth a look for anyone with an interest in Neil Gaiman or knitting. (The key is “sweaterxxs.”)
Update: Here are some more keys. “moustachio,” an example of live-action stop-motion animation, is my favorite of the bunch, though it has nothing directly to do with the movie.
And now for something almost, but not quite, completely unrelated: Snape paper dolls.
Update II: And now for something that is completely different: a WordPress plugin that I might install late in the evening next March 31.
Update III: Here’s the trailer for Coraline.