Skypecasting is here: "A new way to have conversations with people across the world who share your interests. Skypecasts are live, moderated conversations allowing groups of up to 100 people from anywhere in the world to talk to one another."
Update: Jessie Seyfer from Mercury News:
"Experts say the Skypecast service, which is free, melds Internet phone-calling with the current social-networking craze, evidenced by the huge popularity of Web sites like MySpace. And because a person needs to download Skype to join a Skypecast, the service could grow the company's already market-leading 100 million subscribers."