Dr. Eric Svendsen was on The Bible Answer Man radio show on Wednesday (8/13/08). The MP3 broadcast can be directly downloaded here. Dr. Svendsen spent some time talking about Mariology, highlighting a recent article he has written.
His quintessential work on the subject is the book, Who Is My Mother? The Role and Status of the Mother of Jesus in the New Testament and Roman Catholicism.
Also, a few months ago, Dr. Svendsen was on Iron Sharpens Iron. Part one can be downloaded here, part two can be downloaded here. These broadcasts covered a wide range of topics on Roman Catholicism.
I greatly appreciate and highly recommend Dr. Svendsen's work on Roman Catholicism.