As we expected, Apple today released iOS 4.2.1 and brought all supported devices up to the same version of the operating system. You can upgrade by plugging in your device and checking for updates in iTunes.
The update is free for all devices that can run iOS 4, which at this point is every iOS portable device other than the first generation iPhone and iPod Touch.
For iPad owners, iOS 4.2.1 is a very significant upgrade; many of the features that other iDevice owners have been enjoying since iOS 4 was released this past summer are now available on Apple’s tablet. Game Center, folders, tv show rentals, the unified email inbox, and of course multitasking are all now available on the iPad. Read more






Apple updates AppleTV 2 software to iOS 4.2
2nd Generation AppleTV
Along with the release of iOS 4.2.1 for the rest of the iOS device lineup, Apple has updated the new AppleTV 2 device in order to support AirPlay video streaming.
While many sites reported that the new build for the AppleTV 2 was iOS 4.1, it is in fact iOS 4.2 (but NOT 4.2.1 which was a bugfix build for portables due to 4.2 being pulled after it went Gold Master earlier this month).
AirPlay video is of course the major new feature in this build. Users can now stream video from an iPhone, iPod Touch, or iPad running iOS 4.2.1, directly to the AppleTV 2 wirelessly. In addition, iTunes on the Mac or PC can also stream video to the AppleTV 2. Read more