VeriFone Payware Mobile snapvoip.blogspot.com
There are many payment systems for iPhone or other mobile devices. (But I am yet to see the similar services that exists in Japan, where you pay for many a things with just the phone!). Card swipes for iPhone is not new but the Payware Mobile for iPhone is pretty neat and if you are a regular wheeler dealer using credit cards, you can leave it attached.
This is to be released January 15th 2010, and is free on a 2-year Payware Connect contract, and pre-orders are now live on the website. With the savings alone on the transaction processing, payware says, one would be able to pay for the iPhone easily.
payware via Gizmodo