I'm curious about this myself, not specifically for BO2, but for any games that require/are geared toward multiplayer...
Do we have any threads here about alternative/unofficial servers for PS3 games, whether it includes links or not (unofficial servers could be seen to support/enable piracy, so that may be a no-go here), just the methods involved to connect to unofficial servers, especially if there are games where servers are no longer online, would be a valuable resource for those trying to extend he lives of their consoles...