I'm having the same problem. And twice today my ps3 has done the beep beep beep shut down when shutting it down normally.
I was wondering if it had anything to do with Sandy since I'm in NJ and just got power back today or if the servers in NJ/NY area were under water and what not.
Trying to figure out if it's my internet or my ps3 or my ups or sandy or something else. :/