HD Radio on Wikipedia

Sorry haven't posted in a while, I haven't been able to acquire a radio for myself yet, so I've been thinking less about the technology.

I just noticed the Wikipedia article on HD Radio and it has some good information on the technology and includes a discussion of FM vs. AM HD. It also discusses comparable European formats for digital terrestrial radio broadcasts.

I keep wondering if the television broadcasters will really be held to the switch to all-digital in January of next year. It seems like a lot of older people (who vote) area going to rebel. But since there's a statute in place for television, it will probably at least have some effect on radio too. I need to investigate to see if Armitron and the other radio ratings agencies have a way to monitor the popularity of HD broadcasts. I also wonder if we'll see a kind of "tivo" for the car that will record all your favorite radio programs whenever they are broadcasted in HD, and then play them back to you when you drive. Of course, that could work now with normal radio, but with HD, the signal will already be digital and so the encoding can be done a little more efficiently.

Do any readers have HD radio experience to share? I'd love to hear your thoughts on actually using it.