As a facebook user and a Media Center user I was thinking of developing some kind of Facebook status update app. Well it looks like Jussi Palo beat me to it. His background application updates Facebook with what you are watching, eg "is watching News"
Have a play and give feedback to the developer.
Vista Media Center Background add-in that updates your Facebook user status according to what you're watching/listening on Media Center. So, if you're watching a program called "News" on Media Center, soon your Facebook status will say "...is watching News". In the same way the DVD, Recorded TV and Video title is shown. If you're watching pictures status will just be "...is watching pictures". When listening to music status will be "...is listening to ARTIST - TITLE".
Download and read more HERE