Hmm, easier to just grab a free ventrilo server in my opinion, good chunk of people are already familiar with it, easy to use, the quality's solid and a server can be set up easily enough.
You are limited to the number of user, which is less than the number of people typically in IRC. So people will get left out. Also you have to determine a place to host it, and that isn't free. If you use another company's server, it will probably have ads, or you have to register.
So once again I suggest Mumble, it is newer, has better quality audio codecs, and server size is not limited if someone does host one, and there a free servers already set up to use.
If people here wanted to keep using things they were "familiar" with I am pretty sure we would all be on MWS or OCTGN1 still. 95% of people that move on from Ventrilo realize they should have done it sooner, it is the same battle I see with getting people to use OCTGN2. You can slap someone in the face with a better product, but people often times don't like change it seems.
