iPhone App Purchase, Peer to Peer Connectivity, Game Sprockets coming soon With the Software Development Kit (SDK) for iPhone 3.0 unveiled Tuesday, Apple introduces more than 1,000 new Application Programming Interfaces (APIs) for iPhone application developers to use. Front and centre at Tuesday's iPhone 3.0 event were some of the new API's for game developers. Now that game developers have had an opportunity to digest some of what it means, they're ready to talk.