1) Alan Watts:  Lectures by Alan Watts, one of the most widely read philosophers of the 20th century, catalogued by hisson, Mark, for the Electronic University. Talks cover the fundamentals of Buddhism and Zen broken into several short podcasts. Ideal for those new to Buddhist thought. Updates frequently, run times average about 15 minutes. http://www.alanwatts.com

2) IntegralNaked.org: These lectures given by the stars of integral thought are a must for anyone interested in Buddhism, non-duality or integral philosophy. A video podcast under the same name also includes portions of informal lectures by Brother Wayne Teasdale and Ken Wilber as well as live performances by Stuart Davis. Run times vary, updates frequently. http://www.integralnaked.org

3) Fundamental Shift: Rob Scott's 10 to 15 minute podcasts cover a variety of topics pertinent to Buddhist belief with a genuine insight for applying these ideas to everyday life. Honest and practical, Rob addresses the issues of commitment, paradox, and compassion clearly and concisely. Highly recommended. Updates weekly.http://www.backtobreath.com

4) Zencast: "A stream of living dharma", each podcast begins with a song pertinent to the given topic. Archives include meditation timers, a chapter overview of the Dhammapada, as well as a very informative series of talks on the Five Hindrances. Updates weekly, run times vary. http://amberstar.libsyn.com

5) Unfettered Mind: Ken McLeod's lecture series, classes, and retreats on a variety of topics including Releasing Emotional Reactions, Awakening from Belief, and Practices of a Bodhisattva, focusing largely on dzogchen and mahamudra. Huge and informative archive but updates erratically. http://www.unfetteredmind.org

6) Buddhist Society of Western Australia: Wonderful lectures recorded every Friday at the Dhammaloka Buddhist Centre in Western Australia covering an amazing breadth of topics. Each podcast runs about one hour. Large archive, updates weekly. Highly recommended. http://www.bswa.org

7) Free Buddhist Audio: from the Dharma chakra archive. Over 500 audio talks on Buddhism and meditation. Hundreds of seminar and lecture transcripts. Free downloads, or listen and read online. http://www.freebuddhistaudio.com/