Podcast is a broadcast. Ah, simple thing. But it is done over the internet. So, in simple terms, its an audio clip containing a discussion about a topic that you can listen directly on/ download from the internet. And the beauty is, whenever a new podcast is published, you will get to know about it immediately through the podcast's RSS feed. Cool isnt it? :) And the good thing about this is that you dont need costly equipment to do your own podcast. All you need is an internet connection, a voice recorder, a computer to upload your recording, and something to talk about.
So now coming to the point, Business Blogging is conducting a workshop on Podcasting - where they give you answer to the question - "How to do Podcasting?"
So go ahead and read about it here - http://businessblogging.org/podcast/the-workshop.html
and register here - http://businessblogging.org/podcast/register.html