Believe it or not, mobile payment method ISIS is just around the corner. As the NFC-based system nears launch, we now have word that American Express will offer full support of the system. That’s right, if you have an American Express card, you may add it to your ISIS account and use your phone to pay for everything. With support for MasterCard and Visa already in place, and Discover support in the future, it’s looking like ISIS will become a monopoly of the mobile payment world. Excited for ISIS? What will happen to Google Wallet?