If you navigate to a site and you're looking for a certain word, you can utilize the search field in mobile Safari. Under Google suggestions on the iPad and iPhone/iPod touch, you'll see "On this Page" with the words you're looking for.
Awesome when you're looking through forums and long articles.
You've probably seen the hubbub abut the orientation lock button on the iPad turning into a mute button. Well it's true. To lock the orientation of your iPad you have to double tap the home button to enter the app tray and swipe left.
Before you upgrade your device it's always a good idea to back up all of your data. This is especially important when you haven't synced your device in a while. While the chances of a error occurring and forcing you to go full restore are slim, it's always a good idea to backup your stuff.
Notice the new rectangle with arrow shooting out of it? Yeah, that's your new friend AirPlay. Airplay sends your pictures, audio, and video to the Apple TV, and audio to Airport Express and third-party speakers that support AirPlay.