I find the whole case thing puzzling.
I understand putting gadgets in heavy duty cases like Otterboxes, and I have some friends who really abuse their gadgets and it comes in handy.
But most of the super flimsy leather/vinyl/felt cases that people use (including the Apple case) serve no practical purpose protecting the device (they do provide a nice angle for people who need it).
Dropping a naked iPad and dropping an iPad in the apple case would probably have the same amount of damage.
I have a diamante/rhinestone cover on my iPad, covering only the back (like an iPhone case). I am a student and I have it in various types of bags (backpacks, messanger bags, book bags, etc) with all kinds of crap like pens, spiral notebooks with metal bindings, books and much more and there are no scratches on the screen.
I'm sure over the course of the next couple of years a scratch or two might pop up, but do people plan on keeping the device for much longer than that anyway?