"The Mission of Break the Chain is to educate people about the e-mail chain letters circulating on the 'net, share the facts, give our interpretations, and provide the tools and information people will need to make their own decision about the validity of a message. "

The "Currently Circulating Chains" section looks to be pretty extensive - I'll have to check it out in more depth when I get a chance. And the awards section looks like it might be pretty entertaining, as well.