We have attempted a TS3 server, but see, that's one thing that creates limitations, voice chat = very difficult to moderate, plus, we have issues with time-outs. Though, an IRC channel would be interesting to try since it's just chat, and a channel bot could be setup to moderate it.... You can even set it so that no one can talk unless given voice/half op/op/founder... Would be interesting for the test group to try out? Maybe even eventually include a link to "Live Chat".
The downside? Unless you are the one running the IRC server, you won't be able to see the private chats between users.
Would it not be possible, to create a staff that can join the channel and switch on/off depending upon RL schedule, and allow voice (chatting) to all users when present, but once they leave, the bot sets the channel so only +users and higher have the ability to talk, which are users trusted to not cause legal issues?
I know it's not a voice system, but real time chat with fellow members at random, with out having to create posts would be fun I think, and with IRC, and IRC bots, you can do a WHOLE crap load of things. We could even setup an XDCC bot, and with software vendors permissions, make software packages available for download such as CPU-Z, all a user would have to do is type the trigger, and have a proper IRC client since most web-based IRC clients can't do XDCC. The bot could even, instead of doing XDCC, just give a URL for a user to click for the package when they type the trigger.
I know it's a headache for the admins to do, but why not create a team specifically for that purpose in the test environment?