The PlayStation Network is currently offline.
Sony acknowledged the unscheduled downtime in a post on the European PlayStation Blog's official Twitter account an hour ago.
"We're aware that PSN is currently unavailable and working with the technicians to find out when it will be restored. Apologies."
This week's EU PlayStation Store update, which launched earlier today, features Resident Evil 4 HD, Burnout Crash and a new on-console PS3 video show called Access. Hopefully you won't have to wait too long to access the content.