Xbox.com and Xbox Live are reportedly experiencing unscheduled downtime due to unexplained technical problems.
"Xbox.com is having issues at the moment," Eric Neustadter, director of architecture for Xbox Live operations, wrote on Twitter about an hour ago. "It's being worked on - sorry for the hassle, folks."
According to Joystiq, Xbox Live's out of action for the time being too.
Did you manage to grab the FIFA 12 demo that went live earlier today before the service went down?