From the news page
As Peter Ferrera, president and CEO of the HD Digital Radio Alliance said, “Quite honestly, it [HD Radio] doesn’t stand for anything. The concept was somewhat of a steal from HD television, where viewers know it means better quality”
What a lying sack of <bleep>. He must have gone to the Michael Eisner school of spin doctoring (aka lying). They knew damn well that everyone would assume that HD meant High Definition. They intended for the confusion. He may be fooling some of the public, but the people who really know what's going on are going to call him what he is.