Earlier this morning I posted the Press Release from Microsoft on the Xbox 360 update that is coming tomorrow. In that announcement was a brief mention of a new app for Windows Phone, Xbox Companion. I did a little searching and found a great article over at WPCentral and the original content over at Major Nelson.
Basically, here is a brief run down as Major Nelson stated on his site:
Xbox Companion search powered by Bing. Search the unified Xbox catalog for movies, TV shows, music, games and apps using the Windows phone. View a detailed unified results page across all content providers. You can see recently played games and apps and browse the Zune video catalog
He has also posted several screenshots from the app so you can get an idea of what it will do and how it will look. Over at WPCentral they have a video of things in action as well so be sure to check both sites out.
Check the Marketplace tomorrow for this app while your Xbox is updating!