One show I did find interesting was "Metal Roots" -- it was on Saturday sometime in the afternoon -- usually when I wasn't driving. The shows I did catch were quite amazing -- places like indonesia and south america. Learning something new.
I've seen the same w/ Radio Helsinki (lived there for about 1/2 a year in a previous life), CBC Radio 3 Sessions, etc. But most of the US doesn't seek out anything more than the local cumulus station.