Podcast 101

I have been trying to finish up W531 and have discovered a lot of neat sites. I have never listened to a podcast before or really understood what they are. I can not believe the variety and amount of information on about any subject that is available. Music, literature, seminars, etc. I don't know how anyone could keep up with it all. I have been using my Ipod to download some podcast and listening to them in the car. I always wondered what the "rss"-Really Simple Syndication feed icon meant and now I know its used when a podcast is available on a subject related to a website.