Here are a few resources you should be aware of, if you don't already have them bookmarked.
First Brad DeLong, a professor at UC-Berkeley, has an excellent page with many audio and audio/video podcasts on a variety of topics in economics and economic history.
Second, a site that features a classic bit of video from Milton Friedman's Free to Choose series. Friedman does an excellent job explaining interdependence, specialization, and the benefits of trade all with the help of a simple pencil. (HT to Don Boudreaux at Cafe Hayek.)
And finally, for those of you interested in global/international economics, Simon Johnson, the Research Director at the International Monetary Fund, has a blog (link no longer available). I 've looked at it a number of times and it is very interesting - worth a look.
I hope you find these of value.