I am getting this message right now when trying to sign into the PSN on my PS3. It's been 4 months since I've played a MP game online. I never talk to anyone on the PS3. I only download stuff I buy from their store. Is anyone else getting this message?
PSN is down right now. Don't worry.
Oh, and as proof, here is a link to the PSN site where it shows it is down on the left side of the page:http://www.us.playstation.com/PS3/Network