Zondervan and Audible have a special offer right now. If you sign up for Audible through this link you can choose two free Zondervan titles. As I understand it, you get a 30-day trial, after which or during which you can cancel and keep the two audio books. You can choose between some Philip Yancey books, or Rick Warren, or some others, about 60 in all. It must be useful to somebody out there!
Note, the offer ends 12/31/07 and is for new Audible customers only.