Podcasting - What Do You Think Your Students Are Doing?

When and how do you think people listen to your podcast? You've just mentioned people doing the ironing, I imagine with your podcast a lot of your students are listening to the podcast but they may be sitting there and taking notes. For me particularly I can listen to certain podcasts when I'm walking around, when I'm commuting etc. They're all so varied that it's hard to nail it down and classify exactly for every person.