Apple has posted a second beta of iOS 4.3 for developers by way of the iOS Dev Center. Any new features and code references are so far undiscovered, but the release is accompanied by matching versions of Xcode and the Apple TV firmware. Still missing is support for running v4.3 on the iPhone 3G or second-gen iPod touch, suggesting that Apple is indeed leaving v4.2.1 as the last iOS update for the devices.
