With just five days left until Apple's WWDC keynote, some notable holdouts are at last integrating Passbook into their business.
The latest example: Subway, an American fast food restaurant franchise that primarily sells submarine sandwiches and salads. The company on Thursday updated its free Subcard iOS app with Passbook support for users in the United Kingdom.
This allows Subway customers to access their Subcard ID and recent transactions via the stock iOS 6 Passbook application on their iPhone, iPod touch and iPad devices and sync those across Macs and iOS devices via iCloud...