The Xbox Companion app for Windows Phone is now ready for download. The Xbox Companion app connects your Windows Phone and Xbox LIVE experiences. Search for your favorite movies, TV shows, music, and games, and play them on your Xbox from your phone. I made a video to show you how it works on the Nokia Lumia 800.
Once you launch a movie, show or song, your phone becomes a remote control for your Xbox 360. It seems to disconnect once I launch a game for the Xbox 360. That makes sense, since I rather use the game controller instead of my phone for the actual games.
You can download Xbox Companion here. It shows up within Xbox Live in your phone.