I was quite excited recently to discover that Dr. Gordon Fee, Professor Emeritus of New Testament at Regent College in Vancouver, has streaming audio available of a 23 session course he taught on Galatians. Fee is a serious Bible scholar and careful exegete who published a massive 967 page book God's Empowering Presence: The Holy Spirit in the Letters of Paul and also a more accessible condensation of that larger work, Paul, the Spirit, and the People of God, plus many other books. Though the Regent College website featured the Galatian lecture series in June, 06, it can still be accessed by going here. You will notice that the last digit of the URL is "1". To hear the next lecture, erase the "1" and put a "2" in its place, or whatever number you want to hear of the 23 lectures. How wonderful to have this resource available! (A note: if you find the first lecture begins slowly, hang in there. Fee gets dynamic and wound up as he goes along!)
UPDATE 9/28/03 - I have just become aware that Dr. Fee delivered three lectures on the Apostle Paul's Christology at Asbury Theological Seminary in November, 2005 and are available online here.