Not sure I do know what you mean...
Podcasts are sometimes recorded live (3 of the ones i mentioned are recorded radio broadcasts, then converted to mp3 format). The beauty of a podcast is that I get them automatically updated on my MP3 playera and can listen to them when I have time. Me living outside of the U.S. (in spain), i get the oppurtunity to listen to lots of radio and t.v. programs that i don't have an oppurtunity to listen to live here in spain. Does that answer your question Fakemaster???