Skip Pizzi writes: "... Therefore, notwithstanding the industry's recent embrace of the multicasting movement, full approval in its current form is not necessarily assured. And despite its seemingly rosy future at present, the adoption of any significantly burdensome or costly new regulatory requirements for broadcasters who implement multicasting could kill the movement as quickly as it arose. ¶ If multicasting truly is IBOC's killer app, how the final rules read on it will be critical to the U.S. digital radio transition as a whole - perhaps more than any other single regulatory element. ..." Link: Radio World.