[[ If you are a tech savvy person, the following may not be useful to you. ]]
If you are looking to improve your audio/video infotainment, use iTunes and choose from the millions of podcasts out there. There is something for everyone’s taste there. Search the iTunes store for getting to podcasts of your choice.
Use Open culture to stay updated on the best in the podcast world.
There are tens of podcast discovery sites out there other than iTunes. Odeo (Music), Podcast directory, Ipodder, Podcast Alley, Yahoo podcasts are a few that come to mind. I haven’t used them much as I don’t want to crowd my audio/video time. (as if it is not already)