The Canadian Broadcasting Corporation (CBC) has been a pioneer in providing podcasts of radio programs. Yesterday it expanded its offerings dramatically: one can now access podcasts of virtually all of CBC Radio's national broadcasts and some of its local items as well.
CBC, BBC, NPR and many other major public networks provide hundreds of podcasts, so many that those of us who love talk radio cannot listen to them all: but we can choose our favourites and listen to them at any time, as many times as we would like.
Public Radio is now largely asynchronous and accessible to anyone with a computer. I listen to podcasts from these networks on my iPod when I'm travelling and on my computer when I'm at home.
And while someone has paid to create these podcasts there is no direct cost to the user.
CBC podcasts are available on iTunes and on the CBC podcasting site.