http://support.xbox.com/en-US/xbox-live-status
Users may experience difficulties with the following services:
Signing in to Xbox LIVE
Affecting the following LIVE Platforms:
Games for Windows LIVE
Windows 8
Windows Phone
Xbox 360 Console
Xbox.com
Zune PC Client
1/29/2013 6:16:26 PM PST:
It looks like you’ve been disconnected from Xbox LIVE and worse, you can’t sign back in! We will get this fixed as quickly as possible. Thanks for being patient while we sort this out. Please check back in half an hour for more information.
Users may experience difficulties with the following services:
Signing in to Xbox LIVE
Affecting the following LIVE Platforms:
Games for Windows LIVE
Windows 8
Windows Phone
Xbox 360 Console
Xbox.com
Zune PC Client
1/29/2013 6:16:26 PM PST:
It looks like you’ve been disconnected from Xbox LIVE and worse, you can’t sign back in! We will get this fixed as quickly as possible. Thanks for being patient while we sort this out. Please check back in half an hour for more information.