I've been having a fair amount of trouble recently when trying to join online games.
Try with a strict NAT type. Bloody new ADSL internet. Means I have to join sessions in progress from recently played with, nightmare.
And they really nurfed the sniper rifles, they're way too weak.
Black Ops doesn't really have any sniping maps though (e.g. Crossfire from COD4), so it's not been too bad from my perspective.
Nice to play but the levels are to easy to complete.
Pretty much the standard with COD games now though isn't it? I'm by no means a harcore gamer and it never usually take me that long to chug through the story. Pretty interesting one this time round, even if the ending was appalling...