http://heartsofspace.typepad.com/spatialrelations/2006/08/hd_radio_too_li.html
Face it, folks...when you add it up, HD Radio as a platform will never be competitive with satellite or Internet radio on a value for value basis for the end user.
A collection of stories dealing with the new in-band, on-channel (IBOC) technology used in HD Radio (tm) on the AM band