One of the major turning points for the 'indie' podcasting culture was when Apple put podcasting inside iTunes and gave corporate-produced media prominence over the then-burgeoning indie podcasters. They've gradually push podcasting down further into the app – and on the iPhone you can't even subscribe to a podcast from within the Music app. Apple's now announced they're going to spin off the podcast function into a separate app in the iOS. (It'll remain where it is inside desktop iTunes) cc Leesa Barnes for her commentary.
As podcasts slowly get more popular- Apple is planning to remove them from iTunes on iOS and give them a dedicated app in the App Store.