My thoughts on what the article leaves out:
For podcast discovery, I love using Huffduffer. It has a simple browser bookmarklet which allows you to bookmark audio to listen to later and creates iTunes or other feeds you can quickly and easily subscribe to on most of the major podcatchers.
Even better it allows you to search for topics and people. Almost everything on the site (including individuals and even the lists of people you’re following) has audio RSS feed as well as other subscription services that you can subscribe directly to. Love Elvis? Search, subscribe, and listen.
As an example, want to know what I’ve been listening to? Check out my feed where you can see a list, listen to it directly, or even subscribe.