Well it was bound to come along sooner or later.
An enterprising couple (Jona Bechtolt and Claire L. Evans) have come up with a manilla envelope laptop cover, called “AirMail” for the new MacBook Air. It costs US$29.95 and has been receiving quite a bit of press.
I think it’s quite impressive how they’ve managed to turn this product around so quickly. Click here to check it out.