It's here! Today sees the World Cup kick off in South Africa, after the now-traditional build-up of media hype, complaints from goalkeepers about the official ball, and crushing realisations that half the England team are carrying injuries. We'll have to wait for tomorrow for the big England-USA clash, but the joy of the World Cup is following as many games as possible that don't involve your own country. Thankfully, the rise of smartphones and apps makes that easier to do this time round...