Need Your Suggestion

Here’s the scenario. There are going to be around 15 folk in a cybercafe for the Podcasting meet. There are people in US, UK and Australia who want to join in the conversation. Which is the best way to make this happen?

Is there a (free) conference facility where people can dial in?

I’ve heard of Skype, LiveMeeting and ofcourse there’s the Yahoo messenger. Which would you recommend?

Or is there something else better?

Please advise. Thanks much.