Carl Sweatman just sent me an email with this link to the Maria Lectrix blog/podcast.  This blessed soul records portions of various works daily for a podcast, and as she finishes the religious ones, they get listed in the Completed Religious Books section.  From there you can download the mp3s for your ipods.  There are some excellent works there, and I noticed that one of her current projects is On Christian Doctrine by Augustine.  What a service, and thanks Carl for passing this along.