Return here often to see if there are any updates.
UPDATE 10:57am EST: I am logged into PSN. STILL NO FRAKIN' PLAYSTATION STORE.
UPDATE 10:52am EST: Several PSN users are reporting that they can log in again.
UPDATE 10:48am EST: A member of the Playstation Community team just Tweeted:
"Our engineers are aware of the issues with PSN and are working on it, sit tight."