I am so glad you posted this. I got my Ipod a couple of weeks ago and really want to find a couple of Podcasts to subscribe to. I am particularly looking for a good news station, but so far I can't find anything decent, news related or otherwise.
I listen to some on RTE (Ireland - only plave they have Gaelic which my grandmother spoke and a tough language to keep up on if you are outside northwest Ireland) and have listened to NPR. I like the idea of using Podcasts to create educational content and have been thinking of trying that for some of the CME's (medical education seminars) I do. I still need to do more research tho and since video conferencing is working well, there is less incentive to change. It may be cheaper tho so that's a consideration.