Michael Bull, a film and media professor at England's University of Sussex, has spent three years interviewing more than 1,000 iPod owners — only to reach the most obvious of conclusions. In the process, Bull dubbed himself Professor iPod and won a book deal. The book, Sound Moves: iPod Culture and Urban Experience, holds no revelations: People carry their digital content around with them, relying on it to get them through the day. iPod owners use the devices to create personalized, controlled environments insulated from the dislocation of their work lives and the cacophony of the city. Is it any shock Apple found his research worthless?