I wanted to post here, Lauren's recommendation about an excellent resource for those who want to learn more about digital (and downloadable) audiobooks:
There is a very good discussion of digital audio books in libraries available from the OPAL archive of special events at http://www.opal-online.org/archivespecial.htm . It’s the third event listed – a Library U Live workshop titled *Day of the Digital Audio Book,* aired in February last year. You can view the recorded webcasts - three sessions which run about an hour each, or just review the presentation slides. The full workshop covers just about everything having to do with downloadable audiobooks – including hardware, software, vendors, service considerations and lots of other Q & A. This is good information both for librarians who need to know the basics, as well as for committee members working on a pilot project. If you have a serious interest in e-audiobooks, check it out.