Hello Dave, and welcome to the forum.
That is a great question. One I havent really pondered yet. However the the
HD Radios are going to have similar troubles with their hand small hand held units like the Insignia HD50, and the upcoming Zune
HD.
Im not familiar with Sat. Radio enough to opine....but Im sure that one day soon, I will be. FM is a much longer wavelength transmission from what I understand. Maybe just a bit of appropriate length wire would help.
I do know that many FM portables use headphone wires as antennas.