Stay calm and carry on, people: It's way too soon to say that NFC should stand for Now Fatally Corrupted. Yes, Google's breakthrough NFC payments app Wallet is being mentioned all over the news thanks to a flaw--it's vulnerable to a hack that gives nefarious types access to your secure PIN number. But don't believe any doomsayers or fearmongering that you may encounter on this matter; it's not as evil as it seems and, believe it or not, it's actually a sign that the future of wireless mobile...