iPhone's In2Pay Case Turns Your iPhone Into a Credit Card

DeviceFidelity announced their In2Pay iPhone accessory yesterday. It's basically a paired case and app which allows you to simply whip out your iPhone and swipe it over Visa's PayWave consoles. PayWave is fairly common already--many grocery and retail stores use it, and I've played with it in my hometown at the Wawa deli chain (I mention Wawa because my barometer of how useful a new payment system is is heavily based on its ability to buy a hoagie). 

Visa says it's expanding PayWave...