The Dennis Byrne column in today's Chicago Tribune, Media's Top 10 Whopper List (registration required), gives the results of the Statistical Assessment Service's (STATS) 2004 Dubious Data Awards (pdf). STATS at George Mason University keeps track of dubious math and statistics reported in the major media. Another website resource when you are looking up hoaxes and other dubious-sounding statistics.
For those that don't know: a whopper is a big mistake; a huge misstatement; a blatant lie (depending on context). For some reason, a Whopper (TM) is also a hamburger sandwich from Burger King.