Tonight’s Your Mac Life QuickTime radio show features John Gruber — host of Daring Fireball, a “Mac nerdery” Web log. Gruber’s recent “The Art of the Parlay” commentary disputes conventional wisdom about Apple’s platform licensing decisions and its marketshare. Also scheduled is Bill Atkinson, one of the original Mac design team who is now a nature photographer. And Peter Cohen of MacCentral and Macworld will have the latest game news. Your Mac Life is available in an audio-only feed or an audio-video feed, depending on what’s better suited for your bandwidth. It happens this and every Wednesday evening from 5:30 PM to 8:00 PM Pacific time, 8:30 PM to 11:00 PM Eastern.