Librivox.org is a website where volunteers can upload MP3s of themselves reading written material that's in the public domain. It seems like this would be a great resource for learners of Esperanto. If you really like a classic story or text, find it on project gutenberg, see if they have it in esperanto, read it into a microphone, then go to this site:

http://librivox.org/

and you will be instructed on how to upload your volunteer audiobook for public use. I certainly plan to do so. Librivox is also really useful for research and entertainment. It's just generally a great idea.