Whenever I record a session at a conference, I always make sure to ask the speakers permission. I ask them whether I have permission to post their session in its entirety as well as whether I can post clips from it. So far, nearly eveyrbody I’ve asked has given me permission to do so, usually they just want to be emailed so they know where it is and so they can hear it themself. Most people are honored. I have had a few people ask me not to broadcast the entire session, but even then they general consent to allowing soundbites to be broadcast.

I would always encourage other podcasters to do the same!