Urban Legends
Links
Snopes
snopes.com - Urban Legends Reference Pages.
BreaktheChain.org
breakthechain.org - Dedicated to online myth-busting; allows you to search for fake e-chain letters.
Truth or Fiction
http://www.truthorfiction.com/
truthorfiction.com - A website that examines net rumours and hoaxes to test for veracity.
The Skeptic's Dictionary
"skepdic.com - A Collection of Strange Beliefs