At the following time we experienced login difficulties with Xbox Live. However, the issue has now been addressed.
We apologize for any inconvenience this may have caused.
Please refer to the Xbox Live official homepage (http://www.xbox.com/en-US/support/) for the latest status of Xbox Live.
[Date & Time]
Jun. 30 2011 from 12:28 to 14:47 (PDT)
A subset of users are unable to connect to Xbox LIVE.
PlayOnline Viewer (Xbox 360 Version)