If you look at the article I posted in the 'PSN is Down' thread, Sony shut it off. They wanted it to be 100% before rebooting. So they can do stuff about it its just they want it back in tip-top shape.

Quote Originally Posted by us.playstation.com
In order to conduct a thorough investigation and to verify the smooth and secure operation of our network services going forward, we turned off PlayStation Network & Qriocity services on the evening of Wednesday, April 20th. Providing quality entertainment services to our customers and partners is our utmost priority.
Heres the full article:
http://blog.us.playstation.com/2011/...city-services/