Boy, is this PSN hacking thing turning into a major headache for Sony. Last week, the US House of Representatives' Subcommittee on Commerce, Manufacturing, and Trade sent a letter to Sony asking for info on what exactly went down, and now they've responded with some new info.
They still aren't completely sure what was taken, but personal info from at least 77 million people appears to have been snatched. Hopefully credit card info wasn't taken, but they aren't sure at this point.
As for who did it, apparently a file with the name "Anonymous" was left on one of their servers containing the words "We are Legion," which points to the loose collective of hacktivists known as Anonymous. But they really can't say for sure. All I know is that at this point, I'm gonna stick to my Xbox 360.