Sony’s Playstion Network was hacked on April 19, 2011, but Sony did not reveal that its customers private data had been hacked until yesterday.  In their customer Frequently Asked Question section about the breach, Sony states:

“Although we are still investigating the details of this incident, we believe that an unauthorized person has obtained the following information provided by PlayStation Network/Qriocity account holders: name, address (city, state, zip), country, email address, birth date, PlayStation Network/Qriocity password, login, and handle/PSN online ID.  Other profile data may also have been obtained, including purchase history and billing address (city, state, zip). If an account holder has authorized a sub-account for a dependent, the same data with respect to that dependent may have been obtained.  If an account holder provided credit card data through PlayStation Network or Qriocity, it is possible that the credit card number (excluding security code) and expiration date may also have been obtained.”

Sony also stated that it expects the Play Station Network to  be fully restored and back online within a week.