That's true, but to not be 100% functional is something else.
One of the rumors I've heard from GameInformer, is that we might need to re-register our PSN ID's. It's looking more and more like PSN isn't being fixed, but rebuilt. It should be a complete overhaul, and I think it'll need to look it too. If when PSN comes back, it should look and feel different. That'll atleast send the message to people that things have indeed changed.
And...this is why Single-Player games are, and always will be, needed. If Single-Players ever died off, the industry could basically die with it whenever we've got downtime. Imagine if we had multiplayer-only focused games...we'd be screwed. Completely, and entirely. It's why I'll always prefer a good single player game over a great multiplayer game, anyday.
Might be a wakeup call for PSN titles that require you be singed in to play them. Bionic Commando 2, for example.