I set this up over the weekend and it has been working well so far. Some people notice a slight lag or a more "tinny" sound, but it has been fine for me. I set it up in conjunction with Google Voice / Grandcentral.
I've been a big fan of This American Life for a while now. I just listened to "Act One" of "Going Big" and it's a great episode on Baby College, poverty and early childhood development.