Despite the proliferation of subscription-based music rental services such as Napster, Rhapsody, and ZunePass on other platforms, Apple has repeatedly downplayed their value for iPod and iPhone users, and the iTunes Store has continued to grow in size and popularity without a similar official option. Not surprisingly, third-party iOS developers have stepped in to fill the gap, first with last year’s release of Rhapsody for the iPhone and iPod…
