"It's all about how fast they can get customers through the checkout counter, " says Madeline Aufseeser, a payments-industry analyst at Aite Group LLC, a financial-services research firm, who is skeptical many large merchants would try surcharging for fear of angering consumers.

WSJ: Bank Fees Squeeze Retailers

Google Wallet uses near field communication (NFC) to make secure payments fast and convenient by simply tapping the phone on any PayPass-enabled terminal at checkout.

ENGADGET: Google Wallet mobile payment service, Google Offers announced