The Laptop Compubody Sock was developed by Becky Stern as a knitting project over at Instructables. She calls it "an eye-catching hoodie for your laptop to use in public spaces for warmth and privacy," but it looks like Dr. Seuss dreamt it up. It'll definitely catch the eye as advertized, but, with this thing on, at least you'll never know.
Unfortunately the Compubody Sock isn't something you can just buy — it needs to be knitted from scratch.
Check out the gallery for more, and the head on over to Instructables if you want instructions for making your own laptop hoodie.