Yes it does.
at the menu
The first strike map pack cost $15.00
Febuary 1st
The first strike map pap has been out and can be purchased at the market
First Strike
March 3rd
no you cant
First strike and the 3 later DLCs were already released for Black ops
15$ or 1200 Microsoft points
no you buy the whole Map Pack or nothing
Once you are on the Black Ops multiplayer screen go to store and you will see the First Strike map pack for 15 Dollars.
1200 Microsoft points.