Its usually only under maintenance for a day. It should be back tomorrow. The network is down more information is available under related question
The most current information is being added to the related question and it also contains links to the PlayStation Network under it's related links
It should be working within the next week.
The network was shutdown because it was attacked. The related question will be updated as new information is available
The network is down more information is available at related question
No the network is still down. The related question will be updated with current information
No the network is still down. The related question will be updated with the lasest status
The network will be down for days and the related question will be updated with the latest information
The network has been signed off see related question for more information
It is not known when the network will be up, they are working on it. The related question will have the latest information
That information is not known the related question will be updated if the information becomes available
The network has been turned off on April 20 2011 because of an intrusion. The related question will have the latest information and the source as a link
The PlayStation network has been shutdown since April 20 2011. They are working round the clock rebuilding and strengthening the system and should have it back up within a week, Early May 2011. The related question will have the latest information that has been provided and will be updated as new information becomes available.
No the system is still shutdown and the related question will be answered if new information is avaiable The PlayStation Network is still down they will working on it around the clock and they will be giving everyone who is a customer of the PSN 30 days free of playstation network premium.
The last item in the network to come back up was the PlayStation store on June 2 2011 after the April 20 2011 shutdown