If you missed the 02 Wireless Festival or Lovebox, there’s always the Ben and Jerry’s thing on Clapham Common this weekend, or Forever Heavenly in September. The festival explosion is obvious, but there’s been less attention given to the big businesses that have sprung up inside the gates. We’ll leave aside the debate over whether the festival circuit has become too commercial and simply say that it’s... very commercial. Take Live Nation, the American......