Podcasting, is something that I am a huge fan of. One of my professors during my undergrad used quite a bit of them. When I was roaming around on the required sites, I found an intresting podcast on obesity and children, towards the bottom of the subscription, it offered some cool site on lesson plan pages.
In both sites that my Professor provided me with, I found them to have an abundance of information on health, fitness, and childhood obesity, as well as information on Kinesiology. I think podcast are useful, when paper trails of information and a particular subject are not avilable. I particularly enj0y listening to them when I am working out, or on a long walk with the dog.