found this http://www.ps3vault.com/call-of-duty-4-online-fix-coming-2572
"For anybody who has tried to play COD 4 online these past few weeks, it has been more frustrating than being a one legged man at an a** kicking contest. The online network, run by Activision under the name DemonWare has been as effective as the Learning Center’s latest class offering - “How to Marry for a Lifetime by Elizabeth Taylor”. It has at times completely prevented players from finding matches or even engage in private matches with friends. When it does “appear” to be working, you can sit in the lobby for what seems like an eternity, waiting for other players to show up.
Well, the folks at InfinityWard (who do not run the network) and Activision (who does) claim to be working on the problem. The network has been sporadically repaired over the past couple weeks but then proceeds to go south a few days or even hours later. So what’s a gamer obsessed with getting his 100th head shot with a sniper’s rifle to do?! Well, wait a few more days writes user FourZeroTwo on the Infinity Ward forums. FourZeroTwo appears to be a staff member who, in a dramatic break from corporate tradition, seems to feel the customers’ pain and genuinely want to help. Of course it probably wasn’t too bright when he mentioned that the engineers who would be working on the problem wouldn’t be starting until Monday, January 7th because that was when they came back from vacation. Gee, I would hate for one of them to come home early from Graceland just so me and the hundreds of thousands of other players who shelled out $60 could actually use the game as advertised.
I’ll be one of the first trying out the network and will keep you updated. Please add your experiences below. Also, while this certainly is not as serious as, say, the collapse of the telecommunications infrastructure, just how seriously do you take it when you can’t play a game online as advertised? Rant away, just please keep it clean…"