AT&T is partnering with Apriva
AprivaPay is a browser-based application that enables businesses to process credit and debit transactions through the browser of their mobile phones. AprivaPay Professional is a full featured application that is downloaded directly onto a smartphone. Additionally, the service can be integrated with an optional card reader and a receipt printer, allowing businesses to obtain the financial benefits of “card present” transactions, along with printing receipts.
http://www.att.com/apriva