Signing the Cactus Eaters on Kindle --"This bespells doom.''

The other day, someone asked me what I would do if asked to sign a copy of The Cactus Eaters on Kindle. I was stumped. How do you sign a Kindle? With a Sharpie? Can you hack into a Kindle and place an electronic 'signature' on a book file? Or burn the author's initials into the Kindle using a cordless Craftsman soldering iron? But as it turns out, it can be done. Check out this article in the New York Times, and find out how David Sedaris dealt with this.