Your Mac Life, an Internet-based Mac radio show hosted by Shawn King, has announced the lineup for tonight’s broadcast (8:30 p.m. – 11:00 p.m. ET). Guests will be: Frank Casanova, Apple’s senior director of QuickTime Product Marketing; John Buckman, founder and CEO of the MagnaTunes.com Internet music service; and Peter Cohen of MacCentral with Mac gaming news.