If I'm going to play with VoIP, I only want it with Team Mates. Listening to shit talkers is one thing, and even voice available in PuGs is an annoying thought since I bet it's only going to be people arguing instead of playing.
If you want VoIP really bad, there's plenty of solutions past Vent and TS for cheaper people:
->Xfire now has dedicated voice chatrooms and the quality isn't bad.
->There's a free program called GSC that I recommend for peeps who want a more "vent server" style setup. It's an IM with an in-game overlay like Xfire but the voice chat actually lets you setup a 200-slot dedicated server on their data farms, and split up the rooms however you want and has some pretty good codecs. Surprised nobody has thought about trying to make an open/public Demigod voice chat with it yet.
Aside from this, if VoIP is a top priority for your game play, I'd recommend taking a chill a pill and letting them work on making their multiplayer connections top knotch before worrying about these luxuries. I'd say connection issues followed by Clan support is more beneficial to the community than giving random players the ability to yell at eachother.