The iOS 4.3 beta 2 has been released to developers and now available for download from the iOS Developer Center. It's build number 8F5153d.
Apple also has informed developers that the new iPad multi-touch gestures will not arrive with iOS 4.3.
This beta release contains a preview of new multitasking gestures for iPad. You can use four or five fingers to pinch to the Home Screen, swipe up to reveal the multitasking bar, and swipe left or right between apps. This feature will not be enabled in iOS 4.3 for customers, but we are providing this preview to gather input on how these gestures work with your apps.
