Visa and DeviceFidelity working to bring mobile payment functionality to iPhone This ain't the first rodeo for Visa and DeviceFidelity, and if we had to guess, we suspect it won't be the last. Just a few short months after teaming up to bring contactless payments to any mobile with a microSD slot, the two are at it again -- this time aiming for the oh-so-tantalizing iPhone market. Reportedly, the