I'm digging these "book covers" for your MAC notebook. Called the BookBook, the zippers are also supposed to look like bookmarks. Though I'm not convinced on the company's claim that these protective sleeves also work in terms of security, disguising the laptop as a "vintage piece of literature". But maybe thieves aren't as literary-minded as I am; I'd make a beeline for the vintage looking book! More info here. (Thanks to Olduvai Reads for the link).