HighSpeed Conferencing is the only audio conferencing service available to Skype users that offers high-definition (HD) voice quality. There’s no degradation of audio quality, no matter how many Skype users participate in a conference call. And with unlimited usage during a conference call, you can talk as much as you want. Some people stay on the conference bridge all day.I've not yet used the service as right now I'm not involved with large conference calls, but at the point that I do I will very definitely check it out. (On a tangent, I wonder if Polycom has a trademark on "HD Voice"?) Have any of you tried it out?