the voice chat they're using is ventrillo.
and they referenced mordred, the pvp dark age of camelot server. the public channels on that server are just like a transcript of that mp3, only with more swearing and less maturity.
"you're not shit, i own the fuckin VNBoards"
sonic remix:
http://cloudsongadvice.ytmnd.com/
edit: this, like the leeroy jenkins thing, was staged