Later today, Sony is bringing the PlayStation Network down for a little spring maintenance. I know it's not spring in the US, or Europe, but it's spring here, so that's what I'm calling it.
Between the hours of 0900 and 1100 US Pacific Time (convert time here), "the PlayStation Store, registration and Account Management will be inaccessible, including the password reset process", while some users might have trouble signing in.
Everyone else, though, should be gravy.
PlayStation Network Scheduled Maintenance Today [PlayStation]