I've looked into Ventrilo but seemed like more work to set up than Skype.. which I've been using for years and only recently tried out with WGT. It is also a free download..all you need is a mic & speakers .. and simple to set up. I won't say it's better than any other voice chat program, but for myself it's the best of the few i have tried. As far as play here goes, I've played several rounds while chatting on skype without a hitch.
I'm a big fan of voice chat when playing almost any game ... whichever program one chooses to use. If you're a Skype user and want to play, just give a me a shout and we can play sometime. I use the same name on Skype as here.