Go to Meeting
How it works: This service through GoToMeeting allows up to 15 people to participate in a simultaneous phone and/or computer discussion. It's odd at first, but you get used to it. Each conference is for one hour because each caller is paying for their own call and people's time is precious so we don't want to abuse it.
To learn more about the service go to their website at https://www2.gotomeeting.com.