I finished up a pattern from the newest Knitty.com called Jackyll & Hide. It's a variation of a balaclava with a Jack Skellington twist. It can also be worn just as a hat so one doesn't have to make everyone wonder, "Who was that masked man?"
As it's for my 14 year old son to wear to Disneyland on Halloween, I used Red Heart acrylic. It really knit up fast considering it's around 17 inches long. More information and pics can be found on my blog.