Downloading Audiobooks

Here is Thing #22 Learn about audio books. As I said before, talking books and I don't really mix! I don't think I would ever download ebooks, but it was pretty neat learning about them. I watched some of the tutorials in Overdrive's digital media guided tour. This service allows you to browse or search their collection of audio books, and then download them to listen to on your pc, transfer to a portable media device, or burn to a cd (depending on the book's copyrights). The audio files automatically expire after the 21 day loan period. One thing I didn't understand about this service is why aren't the number of copies available of an audio book unlimited? It seems that if it's just a file that is being copied from another computer, that the file could be copied over and over again with no limitations.
I also explored project gutenberg. This site allows you to keep your downloaded books. They have computer-generated audio books, and also human-read audio books. The project also allows you to download text versions to read on your computer. The content seems to be partly user driven. You can help add content following a few rules. The gutenberg project advertises an rss feed so you can keep on top of new books added, or books that were recently updated. Since all the books here are free to keep forever, the selection is somewhat limited. I didn't really find anything on these sites that I, personally, would go through the trouble of downloading, but I thought it was pretty cool that the gutenberg project had sheet music!. These sites seem like another great resource developing from web 2.0.