A Kindle, the popular e-reader, signed recently by David Sedaris at a reading. The New York Times explains:
A recent reading in Manhattan at the Strand bookstore by David Sedaris, whose most recent book is “When You Are Engulfed in Flames,” may have offered a glimpse of the future. A man named Marty who had waited in the book-signing line presented his Kindle, on the back of which Mr. Sedaris, in mock horror, wrote, “This bespells doom.”
Although if you read the article you'll learn that the Kindle might be the most normal thing David Sedaris has signed.