That right: pen, paper, envelope, stamp. Write your letter, put everything together in the right order, and send it off. The dev team guarantees a response to everyone who writes, and maybe even some random swag. Your letter can be about anything that you like, within reason -- the team does ask that you not be profane, offensive, or naked. So avoid those three things, and check out the Fallen Earth site for the mailing address and full information.
Let's enjoy pens and scrap paper while they're still easy to come by!
