Snopes.com for all those email claims, such as he said, she said, it's going to blow soon, rumors

http://www.snopes.com is a great site to bookmark.  If you get an email such as one that talks about an exchange between Bill Gates and a Ford (or GM or..) press release regarding Gates comparing computers to cars and the press release response, go to snopes and type in some key words from the article.  Snopes would give this response:  http://www.snopes.com/humor/jokes/autos.asp.  This site is especially useful for Frauds and Scams, as well as food claims.