With ISIS or whatever it's named now, you can use most card types by linking them to the AMEX Serve card. It ends up working like paypal, if you have money in the pre-pay Serve card, it uses that. If not, it will load some in from another source. I used a Visa credit card for that and it worked fine. The auto load is optional and defaults off I believe. So if you would rather have it decline charges when you don't have money there, you can do that.
It's not as nice as connecting to the card directly, but all the players are too busy trying to make their way into the standard to work together. I'm surprised Apple got the card companies on board. It will be interesting to see.
All that said, I'm still not convinced it's a problem that needs solving. It's kinda cool, but since I generally have to carry ID and other payment methods for places that don't support NFC it's more of a curiosity than anything else for me. A local coffee shop had problems with ISIS occasionally and stopped supporting it because people would come in with just their phones. They are using some QR code based setup now that I haven't bothered to set up yet.