Apple has given developers the Gold Master copy of iOS 4.3, which is slated to go out to users as a free download at the end of next week. The Gold Master is typically the same build users get when the software is released.
Other iPad-specific improvements include a software toggle to turn the switch on the right side of the device into either a mute button, or the screen orientation lock switch--functionality Apple had changed with a previous software update.
Apple said yesterday that only the iPad, iPhone 4, iPhone 3GS, and third- and fourth-generation iPod Touch devices will be eligible for the software update.
To read more about some of the additions and see them in action, you can take a look at our roundup from yesterday.