Podcasting: The Next Big Thing?
Podcasting is currently in its infancy, with only a handful of podcasters. The engadget blog has a detailed overview and how-to guide for receiving and creating podcasts. The instructions are geared for Mac and iPod users, but they at least provide the general idea.
Here's how it works in a nutshell. Any sound file (spoken word, music, etc.) can be shared with others and uploaded to a PC or an MP3 player (iTunes is especially well suited for this). Audio and video files can also be shared through RSS feeds; most RSS newsreaders aren't designed for multimedia, but the files can be opened up in other programs. iPodder is a Windows-friendly newsreader that supports podcasts (.NET framework required).
Wired, as you might expect, has an excellent overview of the podcasting phenomenon.
Source: Smart Mobs