Microsoft has tightened the loose nuts and bolts affecting both Xbox Live and Xbox.com earlier today.
Posting via Twitter, Xbox Support has confirmed: "The earlier issues with Xbox LIVE, Xbox.com, and the Marketplace have been resolved. Thanks for your patience, and game on!"
If you missed it, Xbox.com and Xbox Live experienced unscheduled downtime due today to unexplained technical problems.
Now all is fixed though, you should nip on and download the demo of the stunning FIFA 12, which went live today.