it is but onliy on Multi Player internet server u need to have (Internet) on your consule to get Multi Player Mode Working and u need to have it set at (allow Proxy Servers) for the game to work in Multi Player :)
Short answer, no. Some MMOs do use cross platform multi-player but if you are playing your basic Call of Duty than probably not.
If your in the Uk no. i did the same thing:( what you need to do is buy a multi-region player.
If by online games you mean online multi-player than yes
No neither the PS3 or Xbox 3660 versions include multiplayer. see related link
no but in prince of Persia for 360 and ps3 theres multiplayer
No, not with cod4. Although this feature has been added to many games.
Nope, its only the PlayStation 3 games that you can play online with your PlayStation 3.
The PS3 has two USB inputs and an AV multi out, a HDMI out, an Optical audio out, and an ethernet port.
u have to use your ps3 av multi out cable
no and its never gonna be beacuze i have the game
The just released (June 29 2010) game for Xbox 360 and PS3 is a single player game that is also able to be a multi-player game when online. See related link