If you have any questions about the PlayStation Network debacle, head over to the PlayStation Blog and check out the new Q&A.
Important questions such as "Was my personal data encrypted?" and "Was my credit card data taken?" are addressed, and right off the bat, Sony says they are "currently working with law enforcement on this matter." They've also enlisted the help of a recognized technology security firm for the sake of a "complete investigation." Obviously, Sony feels strongly about what happened, and they make it plain-
"This malicious attack against our system and against our customers is a criminal act and we are proceeding aggressively to find those responsible."
They also make it clear that in regards to personal data, "access was restricted both physically through the perimeter and security of the network." Then they give you some suggestions concerning steps you can take to protect your personal data; specifically, be on the lookout for "email, telephone, and postal scams that ask for personal or sensitive information." Sony will never contact you for this stuff, so ignore any "official" requests you might see.
Oh, and they do confirm that everyone has been notified, and they've "already taken several immediate steps to add protections for your personal data." Read up on that paragraph; it's a little comforting. …a little.