Carl Malamud: Internet Talk Radio, flame of the Internet.  Malamud: This is Geek of the Week, and we’re talk­ing to Stephen Casner, who’s a project leader for mul­ti­me­dia con­fer­enc­ing at USC’s Information Sciences Institute, ISI. Welcome to Geek of the Week, Steve. Steve Casner: Welcome, Carl. Malamud: You’re one of the archi­tects of the mul­ti­cast back­bone, and …read the full transcript.