This is interesting since it appears that we are ahead of the US in that the major Telco's have agreed on the one system and are cooperating with the major payment gateway.
http://www.nzherald.co.nz/technology/news/article.cfm?c_id=5&objectid=10796151
I stuck this in the Android forum since I am not aware of any IOS devices that have NFC and this technology will use NFC.
Of the Android devices I aware of that have NFC, I can think of the Nexus S, Galaxy Nexus, Samsung Galaxy S2(?) and possibly some of the newer phones coming out like the HTC One.
As an aside my daughter has a Nexus S in the US on T-Mobile. But the Google Wallet app is only available on ATT. I have suggested to her she borrows an ATT SIM, logs onto the Play Store to get the app and then put her T-Mobile SIM back. She should then be able to register for Google Wallet and use it. There are quite a few department and clothing store chains that accept Google Wallet so it would be useful for her.