The $171 million that the company attributes to the network downtime encompasses everything associated with the security breach including lost revenue, customer support, a full network security overhaul, and even legal fees. The figure also covers the projected cost of the company's "Welcome Back" program, a goodwill gesture that will offer free games to affected users.
Along with the financial statistics, Sony noted that there have been no reports of actual identity theft associated with customer information compromised in the attack. However, if you are a PSN subscriber, you should still take every precaution to avoid any unpleasant identity issues down the road.