LibriVox bills itself as "acoustical liberation of books in the public domain". Translated from that cute catch phrase back to English, that means they have audio book versions of books that are in the public domain, with links to the textual versions as well.
The vast majority of books with recordings are in English (nearly 10,000 of them), but there are a few thousand books in other languages as well, with Chinese, French, and Italian particularly well represented. (You can search for books by language on their advanced search page.) Because these books are all in the public domain, they tend to be old, so you probably won't be getting the most recent lingo in any of these languages.
They also give you the ability to contribute to their collection of audio recordings. I wonder if anyone's going to try to use RhinoSpike to add content to LibriVox.