I haven't heard much about it in the US although I am sure there are a lot of people on the left that would like to shut down AM radio because the perception is that it is dominated by right wing talk shows.
The government is still bruised by the digital TV conversion so I doubt they are ready for another 10 year fight right now. Mike is right, this will make all current radios obsolete and I doubt there is any easy "converter" that will do anything but decode the signal and retransmit it on FM. At that point it is probably cheaper to replace the radio.
Personally I bet radio would just go away for most people.
I seldom listen to mine. I like MP3 players for my music.
