Heard Roar for the first time when Pete Tong dropped it in Stockholm i may 2008. I was certain that he was just playing with the effects over a beat, but in july this was a release from Get Physical. Since then this wierd piece of "music" has been around. Danny Tenaglia even started his set this summer with Roar and it was a part of Dennis Ferrer EM-mix in september. All you Ibiza-guys have for sure heard Roar many times already.
Must say that Roar is the essenence of electronica. Total simplicity. It's just great and no one can say why.