It's a real shame that Piedmont didn't survive the 1980s as they were one of the best run and innovative airlines in the USA. The Florida Shuttle for example was a real gem of an opportunity that PI exploited to its fullest. I even had the opportunity to fly an FLL-MCO flight on a USAir F28 in about 1990:
Piedmont / USAir F28s by rstretton, on Flickr
Piedmont / USAir F28s by rstretton, on Flickr