I haven't really found my niche with podcasting. I don't typically listen to things except music or books, I don't like short snippets. Podcasts just haven't "gotten" me yet.
Anyway, I found kind of a cool podcast on alternative Muslim views, which I'm totally into because of my background in Islamic studies, so it's possible I might listen to that sometime in the distant future. It just seems like too much work for me. It took 15 minutes to find a podcast I might actually listen to, and another 5 or 7 to add it to my RSS feed (which I also don't use/like). I have my own system which doesn't include podcasts or RSS feeds. But... at least I know how to use them!! I have fancy intarweb skillz.
Libraries have done a lot with podcasting, though. I went to a little (read: long) class on blogging and podcasting at MLA and while I thought the podcasts were painfully boring, I guess some people actually listen to them, which is fabulous. I'd much rather read how to do something because I can read much faster and skim through what I need to figure out -- it takes a while to listen to a whole podcast of someone speaking at a painfully slow speed. But like I said, a lot of people are really into them, and I appreciate that. Lots of people learn in many different ways, I guess that's just not my cup of tea.