Genealogy podcasts can be useful and educational. I listen to several, some current, some no longer active, while walking. I always learn something, even from those that don't sound all that interesting.
You can listen on your computer or any music player that plays MP3 format. It's very convenient. The problem is if you listen on your MP3 player or in your car or any other place away from your computer or desk, you can't make notes on what is said and you can't possibly recall all the things you wanted to remember later.
Some podcasts have "show notes" online. However, if you are listening to an older podcast [older may mean a year] the show notes are gone or outdated. This is understandable but a problem.
Podcasts come and go. It's a lot of work to come up with something fresh every week. There is no good current list. Not even Cyndi has them all. There is a personality factor. Some of these podcasters may just not appeal to you. Others are fine but after awhile you might get tired of their idea of humor.
You can google "genealogy podcasts" as a starting place for locating podcasts. One that is less obvious but I have found interesting is the Online Programming for All Libraries [OPAL]. It is not strictly genealogy but there may be something for you at their website http://www.opal-online.org/archivegenealogy.htm. You can also view the presentations online with slides.