[enjo]

Essentially what they're saying, as far as I can tell, is that I can't offer in app-purchases without going through Apple.

So something like Rhapsody, for instance, CAN build an app giving you access to your existing collection. They can NOT, however, provide for the ability to sign-up new customers without giving Apple a cut. My bet is that punting out to Safari from your app won't cut it. It has to be initiated completely from outside your application.