Free audio books

I just read found this website, LibriVox, that is recording audio readings of books in the public domain and distributing the audio recordings for free. They use volunteers to do the reading. While the quality of the reading will certainly be lower than when read by professionals, I still think this is very interesting. I am tempted to volunteer, though I have enough on my plate for now. Thanks to LibraryCrunch for turning me on to this. And I found LibraryCrunch from Michael Casey's profile on 43 People.