I heard a TV commercial this morning for Microsoft LiveMeeting where the ad said now you can conference others using voice over IP. Now I am not sure if that is what was said exactly but the ad definitely said voice over IP and not VoIP. It seems to me that VoIP is a much more well-known term and I think it might have been what I would have gone with if I made the call (pun intended).
Still, the inclusion of voice over IP in mainstream ads is just a further sign of how mainstream VoIP er voice over IP is getting. VoIP is sexy and sex as we know — sells.