This undated image provided by Groupon shows the company's new payment service 

This undated image provided by Groupon shows the company's new payment service launched Wednesday, Sept. 19, 2012,  that allows businesses to run credit cards using an iPhone or iPod Touch. The announcement sent shares of the Chicago company 7 percent higher in morning trading on Wednesday. (AP Photo/Groupon)
Associated Press
This undated image provided by Groupon shows the company's new payment service launched Wednesday, Sept. 19, 2012, that allows businesses to run credit cards using an iPhone or iPod Touch. The announcement sent shares of the Chicago company 7 percent higher in morning trading on Wednesday. (AP Photo/Groupon)
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