It’s been more than seven years since Apple Chief Executive Steve Jobs bounded onto the stage at the annual MacWorld conference in San Francisco and took the wraps off the first version of iTunes. And oh, what a difference nearly a decade makes: The desktop jukebox has evolved from a simple, no-frills MP3 manager into an ever-expanding media gateway offering music, TV, movies, podcasts and even video games for the iPhone and iPod. Putting episodes of “Entourage” on the same digital shelf as Kanye West and “Ms. Pac-Man” may have been a stroke of genius.
