What is podcasting?

Podcasting is distributing audio or video content via RSS 2.0, or Atom. Podcast clients such as iTunes, Juice, or CastPodder(linux) allow listeners to subscribe to your RSS/Atom feed and automatically download your content to their portable audio players as it becomes available.

Podcast in Wordpress: (wordpress.com)

Create audio or video that you want to share (usually MP3 or MP4)
Upload the file to a server
Link to the file in a post in your weblog
Wordpress automatically Includes a link to the file in your RSS/Atom feed
Listeners

You may like these articles :

1. New Features in Wordpress 2.9: A brief Introduction Image Editor In WordPress 2.9 whenever you upload an image,...
2. An Introduction to Feed and Reader Here are Some General Queries and Their Answers About the...
3. Increase RSS Update Time Limit | Wordpress 2.8.3 While solving issues in wordpress forums, the most common issue...