ventrilo is better than teamspeak imo, and it uses less memory.
but think soldat voice chat will create more lag.
and every 3 seconds:
"MIC SPAM DFUGFDUHFUDHFUHDF EHKSSSSSSSSSSSSSSKSKHHHHHHHHHHHHHH"
*plays beatles full volume down mic*
gets owned
"OMG CHEATED NOOB FFS GTFO SERVER IDIOT"
*mic spams some more*
basicly, it would turn into the mic situation on cs 1.6