In what is either one serious case of unfortunate timing or preparation for E3 madness, the entire PlayStation Network appears to be offline, as seen here. Sony previously announced that they'll be bringing E3 to PS3 users, so perhaps this outage is in preparation for that. We'll let you know as soon as we hear something.
[Update: The PSN appears to be up now, though the PlayStation Store is still offline.]
[Update 2: After briefly going back down entirely, the whole thing seems to be operational now. Anyone notice any changes?]