The new BlackBerry Payment Service SDK 1.5 leverages the API from 1.0. New functionality includes checking for status of a subscription and canceling subscriptions. BlackBerry Payment Service manages the subscription renewals and sends out renewal reminders and receipts to users. BlackBerry App World 3.0 is required for users to benefit from these new features.
Alex Kinsella guest blogs all about the new Payment Service SDK at the Developer’s Blog here. I highly suggest heading over there to get his breakdown including examples of what types of digital goods you can distribute as well as what you cannot.