On the Yahoo podcasters list, this post discusses how Techpodcasts and Podcast Connect aim to operate.

Its that same model of paying the users … sharing the revenue with those who contribute according to how much traffic they generate with their podcasts.

But they have the same problem as everyone else … they are depending on advertising revenue. They are hence subject to the same problems that others have … how to offer edvertising that is a ‘value add’ instead of an ‘annoying distraction’.