Today, Sony announced that is is going to be preforming maintenance on its online gaming service today. It will start at 11 AM EST, and you will not be able to access any PlayStation services, this includes Music Unlimited and Video Unlimited services. If you are online shooting someones head off though, you should be able to keep doing that. Maintenance should end at about 12 AM. Want to see any updates that comes out? Click the link below to access their Twitter feed.
UPDATE: The PSN is back up now. Thanks for your patience!