This morning, the PlayStation Network was hit with a service outage. PS3 and PSP users in North America and Europe are unable to connect to PSN.
Sony does acknowledge the issue but did not say what is causing the outage nor could they provide an estimate on when service will resume. We'll post any updates as soon as they're available.
Update: The European PlayStation Twitter reports service should resume sometime around 10:00 PM BST.
Update 2: Service has resumed to U.S. and Europe's networks around 2:00 PM PST.