Theologian William Lane Craig is currently doing a series on the differences between Calvinist and Arminian Theology. The series can be found on his website here: Defender’s Podcast.
Craig is a gentleman. He presents both Calvinism and Arminianism in a way that their adherents will appreciate. He addresses the differences in interpretation of the key Calvinist passages (Romans 9, Ephesians 1, etc). He also has a knack for getting to the heart of what’s important for each system – avoiding the myths.
As of the date of this post, they are adding new podcasts every week. The Arminian and Calvinist related discussion starts on the podcast entitled “The Doctrine of Man – Part 12 (dated 5/4/09), and continues through to the present series entitled “The Doctrine of Salvation”.
The series has also apparently drawn the attention of James White.