$35 plus tax for the incase sleeve at the apple store was more than I wanted to pay. I will post pictures and reviews of the case I bought when I get it in the mail.
Watch out for the metal zippers on the original incase sleeve made for the plastic macbooks...I got some small scratches and nicks on my Alu book using it. I'm going to buy a Maccase for it now which uses velcro instead.
Yeah, the original incase sleeves for the previous gens fit the new ones, albeit slightly loose. Incase has made no mention of an updated slimmer sleeve for the new Aluminum macbooks. They are however working on an updated hardshell case.