I have always been a big fan of Steve Gibson's website (www.grc.com) with all his neat little programs. After using his hard drive repair utility (Spinrite) years ago, I have tried to follow what he is doing.
Now he has an internet audio show with Tech TV's Leo Laporte and talks a lot about computer security and new network ideas. It looks like they make a show every week that last about 20-30 minutes.
Check the show out: http://www.grc.com/SecurityNow.htm
I am listening to episode #20 now about the new Windows security problem and his show is quite informative. I like that he gives you more technical explanations. I learned about the security issue after my father told me about a story on NPR. That story was pretty vague about the issue except it be triggered by looking at image files on webpages. They interviewed someone from McAfee. Refer to http://www.npr.org/templates/story/story.php?storyId=5076721