With what has happened to graf_chokolo; its just a matter of time before Sony (not the PS3) is going to be hacked into and major damage could be done to them.
There are too many hackers out there that would love to have a target to have fun with. All it takes is one hacker with the right skills and gumption to due such a thing.
There are plenty of people that have both... if I had to bet the person or persons would be Chinese. They love to show how skilled they are at doing such things. And it seems they do it without any repercussion.
So keep your ears open its just a matter of time before we hear about such things happening.
P.S. The bigger they are the harder they fall.