No you don't need anything with Black Ops. I bought the standard version and nothing out of the ordinary came with it. In face on the bullitens on Black Ops it says "Multiplayer always free with Black Ops" or something like that.
Just for those people who don't know, if you're able to stack your PowerUp card with CAG16 (I am) you can get Black Ops on the 360 or PS3 for about $32 shipped at Gamestop.com
Ended up getting it for $30.23 from gamestop. Would have much rather gotten it guaranteed complete from amazon, but I have heard good things, and $30 was my buy price so I am happy. Now just hoping it comes complete.