If you guys need a vent server these guys are pretty good:
http://www.instantventrilo.com/
It's what we use for USSR's vent. Haven't had any problems with them. Very easy to use and understand.
You can also go here:
http://www.retailmenot.com/coupons/ventrilo
And get coupon codes for the ventrilo provider to get 35% off.
I got a 25 man vent server with custom hostname and server redundancy for only $8.12