I reckon this is a fake, from what I believe the Coldplay song is named "Violet Hill", not "Violent Hill". Seems to me that Nike would have the correct title for the song, and some Frenchman has knocked this together in Photoshop, and miss-spelt the name!

I'm inclined to agree with the above... hardly a difficult mock-up to make and a major typo

I hope they do make such an app though, it's the one thing that's always irritated me about the current Nike+ with my Nano.