You can view the PDFs of the report, "The Threat of Data Theft to American Consumers" here.
The most shocking part of the report is the fact that they imply the group "Anonymous" in the attack, even though the group has denied any involvement.
Sony has been the victim of a very carefully planned, very professional, highly sophisticated criminal cyber attack.
We discovered that the intruders had planted a file on one of our Sony Online Entertainment servers named �Anonymous� with the words �We are Legion.�
By April 25, forensic teams were able to confirm the scope of the personal data they believed had been taken, and could not rule out whether credit card information had been accessed. On April 26, we notified customers of those facts.
As of today, the major credit card companies have not reported any fraudulent transactions that they believe are the direct result of this cyber attack.
Protecting individuals� personal data is the highestpriority and ensuring that the Internet can be made secure for commerce is also essential. Worldwide, countries and businesses will have to come together to ensure the safety of commerce over the Internet and find ways to combat cybercrime and cyber terrorism.
We are taking a number of steps to prevent future breaches, including enhanced levels of data protection and encryption; enhanced ability to detect software intrusions, unauthorized access and unusual activity patterns; additional firewalls; establishment of a new data center in an undisclosed location with increased security; and the naming of a new Chief Information Security Officer.
Sony says the service should be back within a week, and will be offering some goodies as reported here: PSN "Welcome Back"