Star screenwriter Brian Koppelman called in to rave about how much more he exercised now that the SiriusXM iPhone app carries the Stern show: "I've been waiting for this for so many years. Howard, it's the greatest. You know, since I was 15 or 16, I've been listening to you guys. I walk across the park every morning...in these couple of days, it's entirely changed the walk! I mean, it's made me want to walk longer."