Security Now is a podcast that I enjoy listening to and even watching. It is a podcast on computer and technology related security. I have learned a lot from Steve Gibson and Leo Laporte on the subject. I recommend that everyone who can subscribe to the podcast do so. It is good for the really advanced user and even good for the average user as well. They break things down to where anyone can understand the subject matter.
Go to the iTunes Store and search for Security Now. They have several versions of the podcast including large and small video and audio. you can also go to www.grc.com/sn to get more information on Steve and his work.
Download the pdf version with pictures here.