You can also subscribe to the audio
podcasts with the RSS feed. To
subscribe with iTunes, just open iTunes, choose "Podcasts" in the menu on the
left, and drag the RSS feed link
onto the iTunes window. Otherwise, also in iTunes, you can go to the
"Advanced" menu and choose "Subscribe to Podcast...", then drag (or
copy-and-paste) the RSS feed link
into the dialog box that asks for the URL.