We've had issues like this lot in the past, and they never really caught on to the general public here. A couple of us would be on mIRC and play around with Teamspeak, but otherwise, it wasn't throughly used with the group.
Ventrillo, while being a good program; requires a specific server, and for server software to be purchased for groups larger than a specific number. Making it ineffective for a group like us.
The chosen few of you that use Modems still, (dial-up), are possibly in the minority. Almost everyone has upgraded to DSL and Cable these days; and that chosen few doesn't constitute revising the desires of the many.
Again, however; voice chat never truly caught on with us... It's almost impractical.
-Chris