When cellular carriers, banks, credit card companies, web giants and start-ups eye the opportunity in mobile payments, they imagine themselves making gobs of money by selling retailers on the merits of their technology. Turns out the retailers might have their own plans.
According to a report in the Wall Street Journal, Walmart (s wmt), Target (s tgt) and a couple dozen major retailers have decided to work on their own next-generation mobile payment system that will compete against the likes of Google Wallet (s goog), Isis, PayPal (s ebay) and many others.

