It is a monthly maintenece routine that was set for today. It should be over by now. it started at 8:30 Pacific time
The last item in the network to come back up was the PlayStation store on June 2 2011 after the April 20 2011 shutdown
Network was shut down April 20 2011 and is completely back up with PlayStation Store opening June 2 2011
On June 29 2010 they just have update 3.40 if that is what you mean by a patch. It added a PlayStation Plus Subscription service package to the PlayStation Network and a PlayStation Network area of Photo Gallery that will allow you to share photos with you friends. They also added a Video Editor and Uploader along with other features described in the related link.
No it was released on the PS3 and Xbox 360 on June 18 2010
The store has been open since the network reopened in June 2011
The Cahill Network Saga - 2010 was released on: USA: 28 June 2010 (internet)
Gundemonium Recollection - 2010 VG was released on: USA: 1 June 2010 (Playstation 3 version) USA: 1 June 2010 (PC version)
It was only down for about 6 weeks and came back up in early June 2011
Shutdowns since them have only been for hours and normally for scheduled maintenance The network came back online after the April 20 2011 shutdown and the PlayStation store's return on June 2 2011was the last part of the network to come back online
June 2010
It will be released on June 26, 2010.
First Strike Map Pack is $15 Escalation the second map pack expected for PlayStation in June 2011 is also expected to be $15