Was just about to browse the forums to see if it was just me, and saw your post right at the top. Good to know the problem isn't on my end.
On a side note, you could always try playing something other than COD. Just a thought.
Slow and unstable from here (brazil). Can sign in, but Warhawk goes 80710092 on startup. Ps store works on xmb from the network menu, but not from the games menu. Network test sometimes fails on psn, sometimes doesn't.