iOS 6 users with iPhones and iPod touches can now add the Starbucks app to Apple’s Passbook, thanks to a new update. Existing Starbucks Card holders can add their cards to the app for phone payment and rewards, while users without cards can sign up for a new mobile card. Up to 10 “favorite stores” can be added to the app — your device can use geofencing to recognize that you’ve entered one of those stores, and load your card…
