SNOPES: The Mother of all Urban legend sites!
ABOUT.Com/urban legends folklore
THE SKEPTIC'S DICTIONARY: UFO's? Diets? Psychics? OK let's Rock and Roll.
JAMES OBERG'S: SPACE URBAN LEGENDS
QUACK WATCH: The "snopes" of Medicine
"The GREAT RANDI": The self-proclaimed Illusionist who outed Uri Geller: still going strong.
JOHN STOSSEL: Denouncer of widely-held myths