If you are like me, then Instacast is constantly running on your iPhone. I no longer download any podcasts for syncing to iOS or AppleTV. I have Instacast on iOS and the AppleTV 2 has streaming of "favorite" podcasts.
However, now I need to remember to regularly backup my podcast subscriptions from Instacast. If I lost my iPhone it would take quite some time to remember what the names of all my favorite shows are. Well, actually most of them are 5by5 shows so I guess I could easily recreate about half of my subscriptions.