Originally posted by Alegis
first of all, battlefront will have a built-in chat system.
Secondly, teamspeak and ventrilo are the most popular voicechat programs for games ATM. Both free. You'll just need a server then which some host for free.
ventrilo.com, teamspeak.org. If you're on xfire others can see which teamspeak/ventrilo server you're on
We use skype, but if those are better programs, we will step over. Let's post this on our forums. Thanks for the tip!