We thought the emerging economies would be first past the post on this one, but it appears that the difficulties of navigating the regulatory delays and uncertainties have eroded the lead. Google will offer mobile payments with MasterCard and Citibank, according to one of the people, as well as with cellphone carriers, hardware manufacturers and retailers. Initially, the mobile wallets will be available only on Google’s Nexus S phone and will use a Citibank-issued MasterCard credit card number and a virtual Google MasterCard prepaid card. Full story.