Last week Apple launched iTunes 4.9 which incorporates a directory of 3,000 podcast shows. Major international content providers, such as BBC, ABC News, NBC News, Disney and even NASA have recently started to make their own Podcast programs.
Besides these professionals there are also thousands of amateurs who deliver their own podcasts to the big audience.
It is predicted that by 2010, three-quarters of all digital audio player users will listen to podcasts. Read more at BBC