The Balanced iOS SDK by Ben Mills allows API communication with the aim to implement credit card and bank accounts into applications. Usage includes code to create a marketplace project, create a card, and create a bank account object.
Based on a filing with the FTC, Robert Scoble is reporting that Apple bought Siri and its voice-driven personal assistant. The iPhone app, which we covered in February, uses over 35 APIs to find the exact data the user seeks. With a price rumored at $200M, this is by far the most paid for a mashup.