Late is better than never! (From the press release. Customer details here.)
With an Amazon Prime membership, Kindle owners can now choose from thousands of books to borrow for free - including over 100 current and former New York Times Bestsellers - as frequently as a book a month, with no due dates Books can be borrowed and read on all Kindle E Ink devices and Kindle Fire
Not exactly the most giving of terms, but it’s a start. Thanks to the Kindle team!