Silicon Republic  O2 creating ‘mobile wallet’ system for buying digital content 19.11.2010   Telefonica O2 is to leverage its billing engine to enable mobile users to use their devices to pay for products and services and, in particular, digital content like music, videos and newspapers on the go. Karl Aherne of the O2 media team is responsible for driving revenue at O2 through the development of new market opportunities and leveraging the scale of the Telefonica group to develop