Sony has announced on the PlayStation Blog that the PlayStation Network will be taken down for maintenance from today until early next morning. The maintenance was supposed to happen yesterday.
During this time, players will not be able to access the PlayStation Store, PlayStation Network Account Management, or the PlayStation Network account registration. Players will also not be to login on the official PlayStation website
According to the announcement, players have until 4:30 p.m. GMT today to get all of their online gaming in. However, Sony has also said that PSN will be restored 7 a.m. tomorrow morning.
There's no word on whether or not players will finally have access to the PlayStation Store after this maintenance.
Source: PlayStation Blog