"But is 'availability' of HD radios the problem?"

"And one broadcaster reported to me that he asked an iBiquity rep how
many HD radios had actually been sold as of the most recent
accounting. And this was his answer: 150,000."

http://www.hear2.com/2007/04/but_is_....html#comments

What a joke - I bet, half were returned for lousy reception and bland
HD channel programming !