I logged into my PS3 about 10 mins ago and realized I had totally forgot about it being down for scheduled maintenance today.
Here’s the announcement posted by Patrick Seybold the Sr. Director of Corporate Communications & Social Media on the Playstation Blog
PlayStation Network will undergo maintenance tomorrow, August 30th.
Maintenance is expected to start at just after midnight Pacific and will last for several hours, until approximately 12:30pm Pacific. During this time, users won’t be able to access the PlayStation Store or Account Management, and may encounter difficulty while signing in to PSN.
Please stay tuned to the PlayStation Twitter feed for updates and a notice when PSN is fully back online.
We apologize for any inconvenience this may cause
Source: Playstation Blog