Here’s everything you need to know about iPad, in a handy eBook format. You’ll learn how to set up your email, contacts, and calendar, and connect to the Internet. Then, with your iPad up and running it’s a great reference for any questions you might have.
The update also brings iTunes Home Sharing, enhancements to AirPlay, the ability to choose the function of the iPad’s hardware switch (mute sound or lock orientation), and the Personal Hotspot feature for sharing a cellular data connection over Wi-Fi using GSM iPhones.
iOS 4.3 will be a free software update for iPhone, iPod touch and iPad users.
Download iPad user guide for iOS 4.3 from here.