Podcast is dying except within the iTunes Store
There are plenty of podcast content there and iTunes Store, iTunes itself, iCloud, iDevices, and even Apple TV provides a seamless way to subscribe, manage, and consume them.
Outside of the iTunes Store, content owners don't really advertise the podcast RSS subscription button despite still producing content. They do post the content on their site but I can't imagine anyone dedicatedly consuming podcast content that way especially if you are on mobile.
Google Listen and Google Reader's demise has had a profound effect on RSS and the contents we use to consume through this technology. Now, if only Apple made the iTunes / Music / Podcast app available for Android.