Question about iCHAT for MAC~

[Musicman408]

So I was just wondering if anyone had Macs, and whether or not you all have used iCHAT. I've seen people use it, and it's a very cool thing. I am kind of confused as to how to set it up. Do you have to have buddies to talk with people who have it or what, and if so, how do you become buds with people. Anyone who has experience with this, your help would be so greatly appreciated.

Thanks SO Much!!

Ethan