Mailinator is a new service which allows anyone to create throwaway email addresses when they don't want to give a real address, yet need the given address to work. Type in any address, like [email protected] and you can check any mail sent there by simply entering "foobar" and clicking "Go". No signup, passwords or other nonsense required. Their FAQ is fun to read and the tagline is "It's like flicking a booger at spam."