Bling Nation integrates RFID-enabled mobile payments with your PayPal account.
The BlingTag is secured to a mobile phone and can be tapped on a reader to manage payment transactions. …
… “NFC radio signals that bounce the short distance between the payment console and the RFID chip, like the one embedded in the Bling Tag sticker, are encrypted. “ …
via CNet: Pay by phone.
Bling point of sale use case.
RFIDa: RFID Technology is an internet destination dedicated to documenting the application of radio frequency identification technologies. 
