My current lifestyle includes very little driving, so I'm listening to most of my podcasts on my Ubuntu Linux desktop. My podcast client of choice for Linux is gPodder.
gPodder makes it very easy to discover and subscribe to new clients.
If you know the subscription address, you can subscribe directly. The address for subscribing to Toronto Mike'd, for example, is http://www.torontomike.com/torontomiked.xml.
It's super easy to peruse all the episodes of a particular podcast, download the MP3 or delete one you've already listened to.
Once a day, after my swim and while I prepare my lunch, I check my feeds for new podcasts and download them for afternoon listening.
