Microsoft has released update 1.6 for their My Xbox Live app. This update only brings support for the iPad to control some elements of the console, bug fixes, & some UI changes. The update also adds Retina display support for the third-gen iPad. My Xbox Live app 1.6 also fixes some bugs for iPhone users.
iPad:
• Use your iPad with your Xbox to connect, control and discover content on your console. Connect your iPad for access to a quick list of your most recent console activity. Control your content with play, pause, fast forward and rewind media controls. Find fresh entertainment to play in the new Discover section.iPhone:
• Bug fixes
 If your don’t have My Xbox live app on your iPhone, iPad, you can download it from iTunes or the App Store for free (link).