The term podcasting plays upon the terms broadcasting and webcasting and is derived from the name of the iPod portable music player, the playback device of choice of many early podcast listeners. Podcasting is not directly associated with Apple's iPod device or iTunes jukebox software. Podcasting is similar to time-shifted video software and devices like TiVo, which let you watch what you want when you want by recording and storing video, except that podcasting is used for audio and is currently free of charge. Note, however, that this technology can be used to pull any kind of file, including software updates, pictures, and videos.
The link provides information of a number of websites providing podcast feeds.
Number of commerical providers as well as independent bloggers are using the enclosure tag of the RSS to provide audio feeds. The trend is expected to grow phenominally. So soon everyone will have a personalized Radio Station and a Cable channel too.
One just needs a server side infrastructure for streaming the feeds and an interface at the mobile to personalize the audio/video channels. And soon we will have a personalized audio/video channel which we can listen/watch at any time.
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