Podcasts
Internet Broadcasting
Recorded audio or rich media segments on any number of topics
which may be updated periodically. The segments are normally free and ready to listen or download at any time, they can be found in directories or right on the sites that host them. This new way of accessing information is great because it allows viewers to access a large amount of information at their own pace.
Any web page that has an feed, audio or other, will allow you to subscribe to it. By subscribing to the feed you will get regular updates via your RSS News Reader or Podcatcher. There are many applications that work with feeds, some are even built right into your web browser. Podcatcher is better suited for audio and video, rather than just web pages, text and images.
iTunes is one example which has a large directory of Podcasts and a Podcatcher that is integrated right into the software.
more info on podcasts and rss
apple /podcasts/itunes
http://www.apple.com/itunes/store/podcastsfaq.html
news readers/podcatchers
http://www.feedburner.com/fb/a/feed101
podcast examples
online directory
http://www.podcast.net/
audio
http://www.quickstopentertainment.com/?p=3868
video
http://jetsetshow.com
audio/multimedia
http://www.thefader.com/blog/articles/category/podcasts
Audio Books
Are just what they sound like, they are books that are read out loud and are derived from books on tape. Any type of book can be found in audio format, from children's books to history or politics. They can be listened to right inside your browser online or downloaded and burned. Sometimes audio books can be pricey to produce so they may be free or have a price on the book depending on the quality or the status of the book.
free directory
http://librivox.org
pay directory
http://www.buyaudiobook.com/audio-books/
Audio Learn
Much like audio books and podcasts, audio learn, or educational audio, is recorded audio, but for quick instructional purposes rather than entertainment. It can also be downloaded and be purchased or free.
Audio learn is an wide umbrella that includes many areas and even more topics. They can be books, lectures, seminars, teaching lessons, tours and languages or really anything.
free and pay directory
http://www.learnoutloud.com/