Well, say we as a Reddit-SWTOR community got a 100 person ventrilo server. We would be able to make chat rooms inside of that server for all sorts of different purposes. A section for general chatting, a section for people to use while doing a flashpoint and they don't want all of the other conversations confusing things, anything you think of.
The Darth Hater people have their own Vent server, and I hop in there now and then just to see what's up. You can check it out by downloading the Ventrilo client (free). Their server information is below, if you want to check out the format of such a voice chat service. They have all sorts of different chats set up.
Spear and magic helmet
https://archive.org/details/WhatsOperaDoc
Just realized people might think this is an exploit, I followed the instructions I found on the swtor subreddit http://www.reddit.com/r/swtor/comments/25gawi/did_anyone_else_manage_to_get_into_the_rancor/ see blinx_n_jeenx post