[free] New podcast app from the maker of Instapaper.
Ranked in these QuestionsQuestion Ranking
Pro Easy playlists
By far the easiest UI for making playlists of podcasts I've seen
Pro Smart Speed and Voice Boost
For listening to talk shows, Smart Speed allows you to skip silences and pauses. Voice Boost is very helpful when the speakers vary from really quiet to really loud - it balances the whole thing out. And you enable them during playback, so neither will mess up music podcasts.
Pro Good catalogue
Pretty much the same as the other options, but nicer categories and list views