So, imagine you just shelled out $200 or $300 for one of those new Kindle Fire HDXs, only to have it scratch in your backpack as you pull it out to gloat to one of your friends. Oh, you poor, poor soul. If only you'd had the foresight to pick up an Origami cover. Like the new tablets, the case goes up for pre-order today -- and will start shipping at the same time as their respective devices. Jeff Bezos was pretty keen to show the accessories off today, demonstrating how built-in magnets allow them to fold together in such a way that the tablets can be positioned in either landscape or portra