They've got a pretty interesting mobile payment start-up named iZettle: https://www.izettle.com https://www.izettle.com. They're currently using Facebook integr

They've got a pretty interesting mobile payment start-up named iZettle: https://www.izettle.com https://www.izettle.com. They're currently using Facebook integration, so you might be able to help them out with that. There are a bunch of other companies in the same space in Sweden alone, apparently: http://blogs.wsj.com/tech-europe/2012/05/25/mobile-payments-heat-up-in-sweden/ http://blogs.wsj.com/tech-europe/2012/05/25/mobile-payments-....