www.podcasttuner.com
From the site:
There’s a new kid in town. A podcasting tool that does everything you wish the others did…
-Subscribe to podcasts with a single click
-Tell you at a glance what shows have new content available
-Listen to podcats without launching another app
-Display OPML show notes without launching a browser
-Send only content you designate to iTunes
-Send individual episodes to iTunes with a single click