I have set up a ventrilo server for use with party chat and raids...
Here is the download link to the ventrilo service:
http://www.ventrilo.com/download.php
the server info is as follows.
Hydrogen.typefrag.com
Port Number:
7838
to setup up the server simply click add/edit servers in the server tab and enter the information.
You will need to setup your characters name so we can see who is who and you should be done