The traditional tenth anniversary gifts of tin and aluminum are appropriate for the iTunes Store. Both durable and somewhat flexible, the iTunes Store has become the preeminent place to purchase music. Still, if not for the unintended assistance of a bungling music industry, the store might have been as ephemeral as iTunes’ social service, Ping.Related StoriesApple to challenge $368M patent infringement verdictFor first time, smartphone sales top other mobile phones in first quarter