Microsoft has updated My Xbox Live app for the iPhone and it now works natively on the iPad. You can now connect your iPad to your Xbox Live account to connect, control, and discover content.
Media controls are included in the app so you can play, pause, rewind, etc. You can also find new content on the Discover section.
The update also includes some bug fixes for the iPhone version.
The app is free and available as a universal app (iPhone/iPad/iPod Touch) in the App Store [iTunes Link].