Apple used today's iPad 2 announcement to update everybody on Apple payments stats.
Jobs stressed that while Apple may have three distinct online stores (iTunes, App Store, iBook Store) they all support purchase transactions against the same Apple Account. Each account (200 million now in total) has a credit card on file that can be used for 1-click purchases. Apple boasted that they now have the most credit cards on file anywhere on the Internet.
The company also revealed that it has paid $2 billion in cumulative payout to developers that sell through the Apple App Store.