Xbox Live is currently down, its not just you! Xbox.com is currently up and showing that Xbox Live is currently up and running although it is actually down. Here's the message on Xbox.com: Sorry were fixing a problem with xbox services right now. Most of Xbox.com still works, and we'll get this right as soon as possible. Please give us a little while to work on it, then try again.
<blockquote class="ipsBlockquote" data-author="XPGBullet" data-time="1384175421"> <div> Update: Xbox Live is back up now for most people. </div> </blockquote> I can confirm, it's working for me.
No problems with Live, but I am having systemlink issues since the last update. TUs were no help. A decent chunk of my systemlink library is currenetly unusable.