I strongly recommend this site.
The Wikipedia entry is en.wikipedia.org/wiki/The_Skeptics'_Guide_to_the_Universe . The following quote is from that site as of 7/7/2012:
The Skeptics' Guide to the Universe is a weekly, 80 minute podcast hosted by Steven Novella, MD, and a panel of "skeptical rogues". It is the official podcast of the New England Skeptical Society, and is produced in conjunction with the James Randi Educational Foundation. The show features discussions of myths, conspiracy theories, pseudoscience, the paranormal, and many general forms of woo-woo, from the point of view of scientific skepticism. The show also features discussions of recent scientific developments in layman's terms, and interviews authors, people in the area of science and other famous skeptics. The host of the show has been particularly active in debunking pseudoscience in medicine. His recent activities include opposing the claims of anti-vaccine activists, homeopathy practitioners and individuals denying the link between HIV and AIDS.
The podcasts can be found on Itunes. I have listened to every one of them.
In addition, they have a list of the top 20 logical fallacies (which can be found at:www.theskepticsguide.org/resources/logicalfallacies.aspx") and a useful links page (which can be found at:www.theskepticsguide.org/resources/links.aspx>).