When it launched with iOS 6 this Wednesday, Apple's Passbook mobile-ticketing feature boasted a handful of high-profile partners -- including Fandango, Live Nation, Lufthansa and Ticketmaster -- but that list still leaves plenty of room for fleshing out. According to Venture Beat, AmEx is launching integration with Passbook later today. The credit card company's Passbook functionality will include notifications for new account transactions, along with the ability to view your current balance and redeem membership rewards points. The service can also use smartphones' location to verify charges flagged as suspicious.
Starbucks, which was featured in an early Passbook demo at WWDC, also announced the timeline for its integration with the service, tweeting today that an "update is coming at the end of the month" and offering no further details. Judging by Apple's earlier previews, Passbook will let customers pay with a Starbucks card. The coffee chain's Passbook functionality looks to be quite similar to its partnership with Square, which will be the go-to mobile payments option for non-iOS customers when it launches this fall.