The PlayStation EU Blog made a statement that seems to hint that PlayStation Network is down due to external sabotage:
“As you are no doubt aware, the current emergency outage is continuing this afternoon and all Sony Online Network services remain unavailable… Our support teams are investigating the cause of the problem, including the possibility of targeted behaviour by an outside party. If the reported Network problems are indeed caused by such acts, we would like to once again thank our customers who have borne the brunt of the attack through interrupted service.
“Our engineers are continuing to work to restore and maintain the services, and we appreciate our customers’ continued support.”
Anonymous claimed earlier they would not attack PlayStation 3 customers, so it could be a different hacker group. We’ll follow this situation as it develops.