As you probably have heard -- it's created quite some buzz, after all -- Starbucks just announced a partnership with Square to accept mobile payments via the Pay with the Square app. That's huge news for Square, which currently processes transactions for some 75,000 merchants, as the coffee retailer is one of the largest national chains to integrate with the payment service. At a breakfast in New York today, Square CEO and Twitter founder Jack Dorsey and Starbucks CEO Howard Schu
