Sony has updated the PSN’s status from offline to “intermittently available.”
The official PlayStation PSN Status page confirmed that the PlayStation Network is offline right now, issuing this message:
The PlayStation Network is currently experiencing high volume and users may experience issues when connecting to the service. We will update you with any changes that may occur in regards to this issue. Thank you for your patience.
We’ll let you know when the PSN is back up and running, which will hopefully be fairly soon.