Debunkatron

I strongly recommend http://debunkatron.com/.

From the site:

When you read or overhear nonsense or the besmirching of science, do you have an urge to respond and set things straight? Are you seeking knowledge and tools to help refute such foolishness? Would you like to be the bane of forums and blogs with topics about pseudoscience, bizarre conspiracies, quackery or the paranormal? If yes to any of the above, then you have come to the right place. Welcome!

Their table of contents from 7/7/2012 was:

• Debunked Subjects
  • Alternative/Complementary Medicine
  • Alternative Nutrition
  • Conspiracies and Denials
  • Creationism (Creation Science, Literal Interpretation of Scriptures) and Evolution Denial
  • Paranormal, Parapsychology (psi) and Metaphysics
  • Miscellaneous Bunk
  • Undebunked Subjects
• Tools for assessing claims
• Concepts and subjects for your debunking toolbox
• Resources and communities for your debunking toolbox

  Enjoy,
  Dan