Or so it seems, according to various reports and complaints around the Internet.
It began yesterday and may have continued into today (I can connect just fine, for the record), and Sony hasn't yet tossed out a comment concerning the issue. …maybe because there is no issue, but we can't be sure.
This unscheduled downtime has apparently caused some annoyed users to encounter the dreaded "8071053D" and "80023102" errors, but it's hard to tell how widespread the problem is. It doesn't seem to be restricted to a particular location or region, although we do know the Network was down in Europe for scheduled maintenance. For now, we're just going to assume these are minor hiccups and everything should be running along smoothly in a matter of hours. But if you're really peeved, you could always try contacting Sony.
As usual, when something like this happens, everyone hearkens back to the April 2011 debacle, which is probably expected. We'll have to go a long way before everyone can finally leave that behind for good.