ABC owned WLS, WMVP (ex-WCFL) and WRDZ (radio Disney) are on the licensed,
but not yet operating, IBOC list:

http://www.ibiquity.com/cgi-bin/liststations?state=IL

I've noticed WLS's AM stereo has been working inconsistantly on my car
radio. I haven't been listening all that often, but I seem to remember WLS
normally broadcasting in AM stereo except when playing network programming
such as Rush Limbaugh or Art Bell.

Anyway, US radio hobbyists can track the IBOC plague he

http://ibiquity.com/hdradio/hdradio_hdstations.htm

Frank Dresser