Comair now ASA/Comair
Express Jet Holding on (didn't do so well with the independent carrier thing)
Skywest Seems to be doing well
Horizon Seems to be doing well, has a niche
Air Wisconsin Holding on

ASA See above
Mesaba Now PinneColSaba
Eagle may be divested
Chautauqua Now Republic/Chitauqua/Shuttle/Frontier/(RIP)Midwest
Independence Out of business
Pinnacle See above
Mid Atlantic Out of business
PSA (assuming you mean PSA not Pacific Southwest Airlines (RIP)) Holding on
Piedmont Holding on
Skyway Midwest Express (Midwest Airlines) regional, now out of business
Trans States (Holding on)
Mesa (Bankrupt (or soon out of bankruptcy)) Holding on

Colgan See PinneColSaba above
Great Lakes Holding on
Commute Air Holding on
Gulfstream Holding on (though the PFT is under the spotlight)

I mean do disrespect to any of the pilots at any of the above carriers. I am only trying to make the point that yesterday's PanAm can become today's PanAm.