If you’re a fan of urban legends—ugh, not that one—then you’ve got to be familiar with Snopes. If you’re not, go there right now and I’ll see you in an hour or two.
Now that you’re back, go read this interview with one of the maintainers of the site to get an insight into what it takes to keep such a thorough site up and fresh. I have a lot of respect for those two. The two are very good writers and they’ve created a site that is just as valuable of a reference as IMDB. Okay, well, maybe not as valuable but it’s pretty close.