Xfire?

Ok ive been playing cod4 quite alot lately, and I seem to keep hearing about this program called xfire? What is it, and should I get it?

A chat program, just like Steam..

Install it and it will auto-detect COD4 (or any game, eve it is pirated)

It is pretty good.

its on xfire.com, im only saying xfire site because we all use it and we all know its legit, and most people has it in there sig. so i shouldnt get banned for saying it, anyway xfire is good because u can chat to people while ingamewith ahardly any lag, and its better then pressing alt + tab all the time, plus u can login msn on xfire so u can chat to people on msn while ingame without doing alt + tab