Intriguing and...yay!

Amazon Rolls Out Kindle MatchBook: Buy a Paper Book, Get the Kindle Version Cheap or Free -- Buy a paper book from Amazon, and you can have the Kindle version for $3, $2, $1 or free, depending on the title

It's sort of like AutoRip (which works for music, and which I love) for books:

Introducing “Kindle MatchBook”: Soon Customers Will Be Able to Purchase Kindle Editions of Print Books Purchased from Amazon—Past, Present and Future—for $2.99 or Less

Amazon today introduced Kindle MatchBook, a new benefit that gives customers the option to buy—for $2.99, $1.99, $0.99, or free—the Kindle edition of print books they have purchased new from Amazon. Print purchases all the way back to 1995—when Amazon first opened its online bookstore—will qualify once a publisher enrolls a title in Kindle MatchBook. Over 10,000 books will already be available when Kindle MatchBook launches in October, including best sellers like I Know This Much Is True by Wally Lamb, The Art of Racing in the Rain by Garth Stein, The Thorn Birds by Colleen McCullough, A Prayer for Owen Meany by John Irving and The Hangman’s Daughter by Oliver Pötzsch, with many more titles to be added over time. Customers can learn more by visiting www.amazon.com/kindlematchbook.