We need to understand how to podcast.
This means that we need to transform a single audio file in a real podcast.The steps we have to follow are:
- produce audio files and we store them somewhere on the web,
- publish them in our blogs or webpages,
- create podcast feeds,
- promote them using services like iPodder, iTunes, etc.
It seems difficult but it is not so. Start reading this tutorial about the whole process.
Then, when you have a clearer idea, go into every single step of the process using the guidelines provided by the tutorial.
In the meanwhile, have a look to a Podcast Publishing Software list.