I could really see this taking off in London if you could use it as an Oyster Card: http://en.wikipedia.org/wiki/Oyster_card http://en.wikipedia.org/wiki/Oyste

I could really see this taking off in London if you could use it as an Oyster Card: http://en.wikipedia.org/wiki/Oyster_card http://en.wikipedia.org/wiki/Oyster_card On a personal note I also use an RFID to unlock the front door to my apartment block and to set the alarm at work. If I could clone them onto my iPhone I could lose two of the three things in my wallet. If I could pay with it too I'd have no need for a wallet (I already keep photos of my kids and a PDF scan of my Driving License in my Dropbox).