Audio and video podcasts are revolutionary tools for educators. Many educators are intimidated by the daunting task of creating and broadcasting their own podcast because on the surface it seems to require a fair amount of ITC knowledge. Fortunately many companies offer tools for educators to use to make this process simple on no to a low budget.
http://blog.learningtoday.com/blog/bid/28378/HOW-Audio-and-Video-Podcasting-for-Education-Made-Easy