I'm still not convinced that mobile payments via NFC are on the road to ubiquity, but these fancy shmancy iPhone cases that double as card holders are all kinds of awesome. KillSpencer just debuted its latest, made almost entirely of exotic rosewood. It's a beauty, to be sure. The front and back are both attached using a removable adhesive, though there's no side coverage for the iPhone. I'd have to review it and throw my iPhone across the room a few times before I could be sure, but it doesn't look as though this case offers the most protection for your phone. But that's not always what a case is about.