I currently own and run my own Ventrilo server, and invite the alliance to use it anytime they'd like. I have posted the server information and a link for a tutorial on how to set the program up. To obtain the password, please message me or contact me in-game.
To download Ventrilo:
Username: (This may be whatever you'd like. Please try to make it something similar to your in-game name.)
Password: This will be obtained from me. Either via message in here, or in-game. You may also contact Kahlan for this information.
Tutorial on how to setup Ventrilo and configure sound and hotkey options: