How long has PSN been off line and when will it come back on?

Ok so yesterday i got back from atlanta after i competed in the spartan race and i wanted to get on my psp but when i did it wouldnt let me log on so i looked online to try to find out the reason and i found out that some fellow f**cknut /b/tards hacked the system and its now under "maintenance" lol i just wanted to know if there was any news of when it would be back online