well, me and my gaming comunity use Ventrilo...
But you probably dont want to get on it as I am the "Billy-Bob" guy and my buddies "Bubba" and "Ned" get on too.
lol.
But yeah I love being on voice and chatting with friends it adds another level of gaming for me. I don't know how I ever got by without it.
But to answer your question ...Ventrilo for teh w1n!!!