Librivox is a great site for free audiobooks (volunteers do the reading from books in the public domain so it really is free). One of the best things about it is that you can download so much of The Bible and listen to it. I recommend putting it on CD or your iPod and listening when you are in the car. I don't think you can replace your reading this way, but you augment it since it is coming in through another source. There are many times when I hear something and it sparks my study in other ways.
