Octopus cards are incredibly cool in HKG (RFID, of which NFC is a subset). Store some cash and you can use the MTR or buy things from 7-11 super easily. http://

Octopus cards are incredibly cool in HKG (RFID, of which NFC is a subset). Store some cash and you can use the MTR or buy things from 7-11 super easily. http://en.wikipedia.org/wiki/Octopus_card http://en.wikipedia.org/wiki/Octopus_card Once you try it, you wish North America woke up...