The hackers were a professional job, it is reported that they got everything on the server including Sony's Decreption keys for blu-ray and games, name information, and account security questions, address, credit card number and yes even CVC2 numbers. Its not blown out of proportion, personally I had a few accounts using the same password as i used on the PSN were accessed illegally from suspiscious countries within a week of this. I have a friend who was locked out of a few of his accounts similarly. Besides that I had to change my card number and cancel the old one. I have heard people being charged on purchases they didn't make from locations they weren't at. There is a class action lawsuit out that Sonys was neglegent in notification time for the data compromised and violates a direct law. An astonishing 77 million accounts were found to be accessed, and then an additional 11 million were found later. Other sony networks have been taken down due to security exploits this exposed. This is the biggest data breach in history. And it is malignant and criminal intended. They are selling people's information. I think this was not the same group that attacked sony earlier probably some criminal organization that noticed the weakness and was opportunistic.
All in all expect sony to suffer over 25 billion dollars over this incident that while only was noticed for three days, was technically accessible for up to two weeks it is rumored via the exploit released that allowed this.
If you want to be ultra paranoid some of the encyrption keys and technology is publically known to be used by our military so I wouldn't ruling out state actors involved in this either. It was mentioned in a news article that one of our militarys secure super computers was being made out of playstation 3 technology cause it was cheaper, looks like that wasn't such a good idea perhaps. I just hope its mostly criminal and not North Korea or Iran getting information they shouldn't have access to. Our Military is heavily firewalled, but once a holes slips in its really hard to stop it without shutting down and overhauling the whole system, which is rarely done and hugely expensive.
So Yes this is a big $*(#$ing deal!