Regarding the hacked PSN network, Sony now says that there is “no evidence” that credit card information had been taken and that the data itself had been encrypted. They can’t rule it entirely, but the security code for credit cards wasn’t compromised since it wasn’t in the system.
However, a password change will now be mandatory for everyone as soon as PSN comes back online and that is just good sense. A firmware update will address the issue when they are ready. Sony promises more details to come soon.