iOS 4.2 which is all set to debuted in November has reached to third beta milestone release & today Apple has seeded iOS 4.2 Beta 3 firmware & SDK to the developers. If you are part of Apple Developer program then you may login to your account and start download iOS 4.2 Beta 3.
9to5mac is reporting Apple has added several new customization features, several new SMS tons & bunch of new wallpapers for iPAD.
iOS 4.2 Beta 3 Wallpapers
iOS 4.2 Beta 3 New SMS tons
Please keep in mind that you must have iPhone UUID registered with Apple to update to iOS 4.2 Beta 3. Dont attempt to update to iOS 4.2 if you are planning to jailbreak & unlock.