Apple has released the latest version of its mobile operating system two days ahead of schedule. The update is already available through iTunes and brings several new features to Apple's iPod touch, iPhone and iPad product lines. Among irPlay has been opened up to third parties interested in using the feature. Applications and websites with AirPlay support will be able to wirelessly stream audio, video and photos to your TV -- assuming you have an Apple TV or the AirPort Express. The iPad's physical side switch has received additional functionality. You can configure it to serve as a mute toggle or an orientation lock, as it originally did prior to iOS 4.2.1.