Apple has released a pre-release version of the Gold Master of iOS 4.2 for the iPhone, iPod touch and iPad to members of the iOS developer program. This likely represents the last developer-only release prior to the final public release of iOS 4.2.
Although Apple has not yet announced a release date for iOS 4.2, public iOS releases have generally occurred within 1-2 weeks of the release of a Gold Master seed. It is currently unknown what specific changes have been made in this latest version, although Apple highlighted new features in iOS 4.2 during its September 1st event and some previews have been seen from prior beta releases.
Apple’s iOS 4.2 GM seeds for the iPad, iPhone 4, iPhone 3GS, iPhone 3G, second-, third- and fourth-generation iPod touch are available now to paid iPhone developers from the iOS Dev Center.