When I travel I download a bunch of podcasts from various places. Several food related ones are from Sporkful.com, and Slate's table to Farm. I also download shows from NPR such as Car talk, Wait Wait don't tell me and Planet Money. One of the episodes I downloaded was "Who Killed Lard". I found the information interesting and thought some might like to listen too. Here's the link to the podcast and also to a newspaper article summarizing the info:
http://blogs.sfweekly.com/foodie/2012/01/theres_a_reason_we_think_lard.php
http://blogs.sfweekly.com/foodie/2012/01/theres_a_reason_we_think_lard.php