Apple has released the iOS 4.2 gold master to the developers. If you are an developer, login to your developer account and download the latest release. Additionally Apple has also rolled out iTunes 10.1 beta 2 which is required to install the iOS 4.2 on your iDevice.
Good news for the iOS lovers, folks at Gumball Tech rel=“nofollow>/a> has posted direct download links of iOS 4.2 and iTunes 10.1 beta 2 for all the iOS devices (except iPod Touch). So you can try out the iOS 4.2 even before it officially releases for the public.