Man, Sony hasn't fared too well over the past few years. They got hit again last Monday and it seems like a doozie. Via Reuters (emphasis mine):
"Technicians are making headway in repairing damage caused by the attack and expect to have the email systems back online Monday, said the source who commented on the FBI investigation."
Imagine if you worked for a large company and your email was down for an entire week. That is just crazy. Also huge news in the leak; DVD quality copies of five movies, one that has only been in theaters a few weeks, were stolen and leaked online. Owwww.
I don't know if Sony still has there heads up their asses when it comes to security after numerous attacks but I say this all the time: you could have one of the best security teams in the world and it doesn't really mean shit. The hackers out there a too many and are too good. If they really want to hack you, I firmly believe there's not much you can do to stop them (although it sounds like you could do a bit more than Sony).