Although not quite the same as a podcast, many church websites have audio sermons on them. I am a church website admin and have been tinkering with Banshee and eventually want to replace the website cms with Banshee. Version 6 and 6.1 come with Composer which may have a podcast app that will work with Banshee. Haven't tried yet. Computers are a hobby for me in my spare time so learning this has been a slow go.