My friend Scott Bellware has a TDD podcast on PodcastStudio.NET:
Number Five is alive! We chat with Scott Bellware about Test Driven Development. Scott explains the philosophy behind TDD , why it's so important to successful software development and clears the air on some popular misconceptions surrounding TDD. We also jaw about Code Coverage and Cyclometric Complexity and their importance in the well balanced developers diet...
MP3: http://www.podcaststudio.net/files/2005/08/PodcastStudio-Show5.mp3