Update: And the store is now back online!

If you find yourself unable to access the PlayStation Store – here’s why. Certain PSN features, including access to the PS Store, along with account management and registration have been temporarily disabled. Rest assured, however, that this period of maintenance will not affect online gameplay.

PlayStation Network Temporary Unscheduled Maintenance [PS Blog]

Read more: PlayStation Store Down For Maintence Tomorrow, Attn: PlayStation Network Will Be Down On Wednesday, Sony: PlayStation Network Down For Maintence Tomorrow, PlayStation Store for PC Reopens, Media Manager 3.0 Software Released, Sony: 2 Million PSN Accounts Created In Japan