Nightwing... Did the brown cover have a stiffer front? The black one that comes with the Sony Reader is nice, but I'm afraid someone will squeeze to hard and break the screen, and I don't feel comfortable putting it in a bag, portfolio or backpack for the same reason.
That would be a nice addition.... a case with a titanium insert. Light, thin and strong.
Of course, there's still the fact that it will "click" the joystick control if you squeeze the cover when you pick it up, but that's probably not a big deal unless the Reader is on and at a menu.