I changed OSG from our current Ventrilo voice server to a TeamSpeak one today. A lot of you had been asking for it and well I listened I was hestitant at first as I have always used Ventrilo and was so familiar with it. I must say it is an inferior product after messing with TeamSpeak 3 some.
One of the advantages that I like the most is the ability to turn up others inbound voice at the user level. With Ventrilo you can turn it up for everyone but then others are too loud or quiet.
You can get the server details here.