PS3 Black Ops Players: Don’t Delete your Data

According to (Gametrailers.com) PS3 Black Ops players: Do not delete your save data to fix connectivity issues.
Many PS3 users have had network connectivity problems since the release of a patch Tuesday, and a rumor spread that deleting save data would fix the problem, but Treyarch warns that’s not the case.
Treyarch is working to solve the issue now and released a hot fix last night, which is what solved many players’ problems, not the deletion of save data.
Treyarch is active on the forums to solve connectivity issues, so if you’re still having problems check with these guys to see if they can help