Start at their website for a bit of background information, and then move on to the podcasts for the full story:
Tour of Chile Part 1: featuring the Koyle, Miguel Torres, San Pedro, and Maquis wineries.
Tour of Chile Part 2: Casa Lapostolle, Montes, Viñedos y Bodega Apaltagua, and Cousiño Macul.
Tour of Chile Part 3: Concha y Toro, Veramonte, and Casablanca
Tour of Chile Bonus Reel: The final wrap-up of a great trip.