BF2S is now running a mumble voip server.
http://mumble.sourceforge.net/
You can connect to bf2s.com and use it if you'd like. Myself and friends are using it while playing games because:
A) It supports positional audio, which is just snazzy.
but realy
B) It sounds like the person is literally sitting next to you and the latency is almost zero.
Seriously, the voice quality on this client is stellar.
http://mumble.sourceforge.net/
You can connect to bf2s.com and use it if you'd like. Myself and friends are using it while playing games because:
A) It supports positional audio, which is just snazzy.
but realy
B) It sounds like the person is literally sitting next to you and the latency is almost zero.
Seriously, the voice quality on this client is stellar.