Click this to go to GETTING STARTED, contains all 3 parts: What are Podcasts, Itunes and Podiobooks.
iTunes is a FREE and fast download. It is really a MUST have if you want to enjoy podcast. There are other programs that may work just as well or better, but I use and enjoy iTunes. Download Itunes at www.apple.com/itunes its a free, fast and easy download. You can go to the iTunes store and search for podcast. There is a comment section where you can view what other listeners have posted and you can post your own thought on the content. They have a lot of free content. You can also preview and download music for around $.99. There is also TV show and movies available. You don’t need an iPod or iPhone to listen, you can listen right on you computer (PC or Mac). You can load your whole Music Library into iTunes and then load them to your iPod/iPhone/iTouch. I have a 80 gig iPod that holds all my music, podcasts (including video) and audio books.

So why are you still here? Go download it and start listening.