Introducing Kindle MatchBook
For thousands of qualifying books, your past, present, and future print-edition purchases will soon allow you to buy the Kindle edition for $2.99, $1.99, $0.99, or free.
Available for thousands of great print books purchased new from Amazon, going all the way back to 1995 when Amazon first opened its online bookstore.
In a word? OMG, this is pretty darn fricken awesome! (It's too cool for just a single word!)
The only downside for me on this is that I bought so many of my books before Amazon (yes, there was such a time). Oh well, still a number of purchases were made on Amazon, and I do enjoy re-reading, so this is still officially cool...