SATA (Azores airlines) have a single Dornier 228 in thier fleet specially for flights to the smallest Azorean Island, Corvo (pop 400). Corvo's runway is variously reported as 600 or 800m, and it has a drop into the ocean at each end. Some flights operate a short 5-minute hop to nearby Flores, but I think that there may also be flights to Horta, which is over 150 miles away.
To this layman, the 228 looks like an interesting proposition, given what SATA manages to do with it. Seats only 19, but it seems to be versatile and reliable.
Anyone ever flown to Corvo? I'd love to, but haven't yet managed it.