The release of iOS 4.3 Beta 1 to developers has revealed some fascinating new developments for the iPad, according to BGR, whose dev sources have told them that one of the major new features included in iOS 4.3 is new multi-touch multitasking gesture support for the iPad. These include using four or five fingers to pinch to the Home Screen, swiping up to reveal the multitasking bar, and swiping left or right between apps.
Also included in the beta is a configurable slide switch, giving the user the ultimate choice of whether or not they want the slide switch on the top right-hand side of the iPad to be a mute button or to resume its old rotation lock role. This is one feature that is going to make many people very happy, as the loss of that physical rotation lock caused a lot of anger!
Finally, another new feature found in iOS 4.3 beta that might not be quite as popular as the return of the hardware rotation lock is full screen iAd banners on the iPad.
Source: New goodies found in iOS 4.3; multitouch gestures for iPad, more | BGR | Boy Genius Report