A pretty good public radio show/podcast worth listening to anyway... their most recent offering was a discussion on plant-based diets. It's worth a listen, especially if you are not completely embedded into one camp or the other.
Don't Eat Anything With A Face – IQ2 Debates
The comments on the page are the usual vitriolic spew, sadly, but the debate itself is pretty interesting. I think both sides managed to steer onto some unwise tangents, but I think that's close to inevitable when on stage and in person, rather than in the cool comforts of your internet hovel of choice.