Do you remember the old Burger King advertising campaign - "Have It Your Way?"
Menlo Park Presbyterian Church has done a great job of organizing and presenting six different options for visitors to use in accessing sermons on their website. Several free options, a couple paid, but really a great job of presenting the content in a clear and intuitive way. Doing this makes the content accessible to the maximum number of visitors in the medium they prefer.
My only recommendation would be to include a summary or description of each message that could be accessed by clicking the title or a "Message Summary" link. Adequate product descriptions are a key to conversion rates.