Actually, its still a bit messed up, they fixed the lag in the PS Menu during the game, and they fixed the problems with partys and stuff, but one big problem still lies with the connection, 75% of matches I play say connection lost in the middle of the match, everyone is kicked. Its really annoying, MW2 was bad when it randomly used to kick you, but the amount of times you get kicked in Black Ops is ridiculous.
Also, when its changing hosts, and you are the host, even if you didn't quit the game it still kicks you...
And the hit recognition is horrible, you shoot a guy and it hardly registers some shots as hitmarkers, or you stab a guy, your right next to him, 2 seconds later your on the floor dead because you've been shot.
Seriously, such a excellent game has been flawed by the bugs, they need to fix this fast.