Podcasting

OMG!! Podcasting? Can anyone help me? I just get so confused when it comes to podcasting. I have a small understanding of what they are as a friend of mine downloads Hamish and Andy podcasts from their radio show to listen to. I also had a small experience with podcasting when I went to QUT in Brisbane, as all the lectures would be made in to a podcast and available for download from blackboard if you were absent or wished to see some of the lecture again.

But I have never heard of podcasts being used in the primary classroom and, quite frankly, I am not sure how I could use them.

Could anyone let me know their ideas?

Thanks =)