We've received an update that the MyMediaMall web page will be changed in mid-August (no exact date yet) to accommodate the new MP3 format of audiobooks that can be played on most personal devices (MP3 players, cell phones, and iPods). The District of Columbia Public Library has already had these changes made to its site (preview it here).
We've also received a list of publishers that will be providing the new MP3 titles. The publishers are:
Books in Motion
LA Theatre Works
One Voice Recordings