The NY Times says
Some of the largest book publishers in the world are stripping away the anticopying software on digital downloads of audio books.
The trend will allow consumers who download audio books to freely transfer these digital files between devices like their computers, iPods and cellphones — and conceivably share them with others. Dropping copying restrictions could also allow a variety of online retailers to start to sell audio book downloads.
And perhaps libraries will start offering audiobooks that can be played on iPods as well. It boggles me that they think they're providing a service when the Microsoft-DRM'd files can't be played on a vast majority of mp3 players.