One of the running jokes between Caro and I concerns the Canadian radio industry's endless promotion of "digital radio," a technology that they have promoted as being "five years away" for the past fifteen. Now a real digital radio is coming not from the mainstream of the radio business, but from car manufacturers and home satellite providers. Heather Newman of the Detroit Free Press has an excellent review of the two main providers, Sirius Satellite Radio and XM Radio. Neither available in Canada at this point, and requiring receivers that go in your car, not on your hip.