Authography is a service that allows authors to insert signature pages into e-books.

Authors are freed from the brick and mortar prison. Rather than trying to entice readers into tired, outmoded stores authors can visit and interact with communities of readers wherever they are. Authors sign a temporary signature page until the customer has completed the online (or in store) purchase. The retailer's online store merges the autograph page into the ebook and transmits to the customer's eReader device. The author is not restricted to a single title or publisher - all of his or her books can be chosen from a selection menu at the customer's request for autographing.

I like how they shit all over "tired, outmoded" bookstores and then add a parenthetical addendum that their service would work great with stores. That said, I expect there is a solution to the problem of autographing e-books, and I think that solution will look something like this, a separate page that is slipped into the e-book somehow.

(Via Tele-Read.)