I have to admit I was skeptical about the Pod casts at first. I had a fear that they would reduce the amount of direct contact with the students and questions about the lectures would go unanswered. I am happy to say I was very wrong. You have come up with a way to increase the amount of teaching time for your class and I feel Aaron is doing very well with it.
Podcasting is a great idea. It is allowing you much more student contact time which allows for more information getting to your students. You should be paid extra for the time spent taping the lesson.
The paradigm shift of teachers being available for the hands on part of learning and the homework is watching the lecture is a nice positive change in the education field. This change allows our son to have access to his teacher to answer any questions he might have after watching the podcast. This system does not eliminate teachers, but allows them to teach in a different way that has been very beneficial for our son.