The remote app for the iPad has been updated. The app allows you to control iTunes and Apple TV from anywhere in your home and can pause, rewind, fast forward, shuffle, and adjust the volume from the iPad. You can view album, movie, or a TV show and even create and update Genius playlists. Heck, you can even control the volume on each speaker independently.
The new version of the app is optimized for retina displays and large screen real estate on iPad, and adds support for shared libraries on iTunes. [link]