It's not hard to see how Audible has won over the hearts of so many. With over 18,000 downloadable audio titles to choose from, there's something for everyone. Audible has low prices for shoppers and even lower prices for members.
Audible.com offers a powerful collection of audiobook best sellers and classics by authors such as Tom Clancy, Stephen King, John Grisham, Mary Higgins Clark, James Patterson, the Dalai Lama, David McCullough, Stephen Hawking, William Shakespeare, Emily Dickinson and Jane Austen.
Audible.com offers also speeches, lectures, on-demand radio programs, audio magazines, and audio newspapers.
All of the programs at Audible.com are available for computer-based playback, burning to audio CD, and on-the-go listening using numerous "Audible Ready" portable digital audio players offered by leading consumer electronics and computer manufacturers.

Jiggerbug is an online audiobook rental company designed to allow active people to make the most of their time by listening to their favorite books, courses, and audio programs without the hassle of leaving their home and without the needless expense of buying them.
As a Jiggerbug member you can create a wish list of audio titles that you would like to hear. Jiggerbug ships you the first title on your list via first class mail. When you are done with the title, simply return it in the Jiggerbug prepaid envelope. Once Jiggerbug receives it they will ship your next title. It’s that simple.
Your first audiobook rentals are FREE for two weeks!

Simply Audiobooks is North America's source for audiobook rentals. Simply Audiobooks offers subscribers a monthly membership allowing unlimited access to the library of audiobooks (2000+ unique titles). Rent all the audio books you want on CD.
The CD shipping is free both ways right to your door.

BAMM.com (Books a million bookstore) claims to offer the lowest book prices of any leading online bookseller. Look for the "Compare Prices" links to check it. Books a million bookstore offers also a nice collection of audio books available on either audio cassette or on CD.