As shown off at many keynotes, Passbook holds your plane ticket, coupons and your Starbucks card. But currently it doesn’t support much. According to the Starbucks Twitter account, Passbook will be getting the ability to add your Starbucks card to it by the end of September .
Updated to iOS 6? Our Passbook update is coming at the end of this month! 00111010 00101001—
Starbucks Coffee (@Starbucks) September 21, 2012
This comes at good news, as Starbucks was one of the main demos at the WWDC back in June.