snopes.com: Rumour Has it!

Snopes.com, officially the Urban Legends Reference Pages, is a website covering urban legends, Internet rumors, e-mail forwards, and other stories of unknown or questionable origin. It is a well-known resource for validating and debunking such stories in American popular culture, receiving 300,000 visits a day.
 Snopes aims to debunk or confirm widely spread urban legends. The site has been referenced by news media and other sites, including CNN, Fox News Channel, MSNBC and Australia's ABC on its Media Watch program. Snopes's popular standing is such that some chain e-mail hoaxes claim to have been "checked out on 'Snopes.com'" in an attempt to discourage readers from seeking verification.