Just a reminder: You can make any mp3 show up as an audio book on your Kindle. Just put it in the Audible folder on your Kindle. If it doesn't show up, you'll need to add something called "ID3" tags to the mp3 file, which is an easy process detailed in this topic.
Works for me, and it saves the hassle of dealing with an mp3 player in addition to the Kindle.
Works for me, and it saves the hassle of dealing with an mp3 player in addition to the Kindle.