I've been using Goto Meeting off an on for a couple of years now to do virtual meetings. I have to say I'm impressed with one feature in particular.
In the latest version their audio-conference is smart enough to detect when I am talking through the phone, and it updates the UI telling all the participants that I am talking. I find this simply amazing, and maybee its because I am tired, sick, and have been sitting here for 8 hours straight looking at code, but I really wonder what it takes to do that.
Anyways its a great inexpensive tool for hosting virtual meetings. Go check it out.