Free MP3s and Audiobooks!

As far as I know, these offers are all still valid.

Get 75 free MP3s compatible with any player from eMusic when you use the Pizza Hut promotion. 25 of these songs are on a Pizza Hut sampler. No Pizza Hut purchase necessary. Basically you sign up for a free trial, any of them will do, download your 50 or 75 free songs, and cancel the trial within 14 days and you owe nothing.

eMusic also offers a free audiobooks trial, same deal as above, and get 1 credit toward any audiobook. Many books are available for just the 1 credit. You can also get one free audiobook from each of the following promotions (in theory- you probably have to provide different email addresses to take advantage of each): Audible.com is sponsoring the Escape Pod family of podcasts. Visit Escape Pod, Pseudopod, and Podcastle to get the details, but basically you will be able to sign up for a free trial, download a one-credit audiobook and cancel your trial without having to pay anything.

All of these above promotions require a credit card number, but they won't charge anything unless you forget to cancel or go over the terms of your free trial.