Well, since this old thread was resurrected, I'll add my comments.
Audiobooks as well as ebooks were originally mentioned. I can't help with audiobooks, but how about some radio dramatizations from 1953? Like most old radio programs, the copyrights were not renewed, so download at will.
http://www.archive.org/details/Adven...tio_Hornblower
Some day I'll have to give these a listen myself. I have over 200GB of OTR (Old Time Radio), so it takes me a while
Joe