Apple releases iOS 4.3 Beta 1, Mobile HotSpot included (engadget.com)

The Mobile HotSpot requires carrier activation. For iPads they are re-enabling the hardware orientation lock as a configurable option.

Apple link: https://developer.apple.com/library/prerelease/ios/#releasenotes/General/RN-iOSSDK-4_3/index.html#//apple_ref/doc/uid/TP40010565