ATLANTA - He entered the rock 'n' roll pantheon as a joker, a smoker and a midnight toker. But sitting in a gray business suit in front of 400 corporate executives, Steve Miller's message had more to do with knowing how to take the money and run. "I love playing, but you can't get to the good stuff unless you keep an eye on the business," Miller said after speaking at a conference put on by a corporate research and advisory firm. Miller's speech underlies a truth that's been around for decades, but become more obvious recently - rock 'n'...