No. A PS3 copy of the game won't work on an Xbox - you will need to buy an Xbox copy of the game.
its better on xbox 360
cod black ops is on pc, xbox 360, ps3, as well as wii and ds (i believe). However the main version is on the pc, ps3, and xbox 360.
The PS3 of course
What it depends on is your PS3 or XBOX 360. I have a PS3 and it has 160 GB.
Xbox 360
xbox-360, Wii, PS3, and DSi
no
No PS3 game will work in a PS2.
Yes, Call of Duty Black Ops releases for the Xbox 360, PS3, PC, Wii, and DS on November 9, 2010.
ps3, 360, and i believe PC
no
Black Ops was created by Treyarch for the PS3 PC and Xbox 360