You are so right. Audio books make the long flights, the long waits, the long train rides, the long car rides, and the long hotel nights awake and jet-lagged easier to take.

Librivox is the gold standard for out of copyright material. My personal favorites there include Ernest Bramah's Max Carrados mysteries read by Andy Minter, or Allen Fea's "Secret Chambers and Hiding Places" read by Peter Yearsley.

http://librivox.org/


Here are some other excellent sources for obscure audiobooks not listed in that article.


Enjoy some old-time radio shows as well, such as the Lone Ranger, X Plus One, Conan, etc. here:

http://www.digital-eel.com/rtsf/
http://www.alienworlds.com/
http://decoderring.libsyn.com/


Full cast audio productions:

http://brokensea.com/


Science Fiction Audio:

http://www.sffaudio.com/


Finally, some podcasts comprise a brief introduction of a work and its author, and then the book or short story read in its entirety, and then a closing set of remarks. Science Fiction appears to be the genre that has embraced this mode, with outstanding podcasts such as Starship Sofa and Escape Pod.

http://www.starshipsofa.com/
http://escapepod.org/

Escape Pod's sidekicks, Pseudopod and PodCastle, for you horror and Fantasy fans:

http://pseudopod.org/
http://podcastle.org/