I remain amazed at how misunderstood the notion of “podcasting” is. It’s been nearly 4 years since it arrived on the scene yet folks in public media remain baffled — along with the general public.
Perhaps Leo Laporte was right a couple years ago when he suggested that the “pod” in podcasting be eliminated and replaced with “net” to make “netcasting” the word. Of course, that might have confused things with various forms of streaming.
In any case, here’s yet another Common Craft video you can share with your public media clients to explain podcasting a bit. You can even contact Common Craft to get the video branded with your own company name.
I would also recommend Apple’s introduction to podcasting, which is iTunes-specific, but iTunes is a really great choice for most listeners due to the integration of their podcasting directory / subscription system.
Gravity Medium 
Great video, John. Thanks for the pointer. I’m going to embed it on my Ed. Technology website. 🙂