From what i have heard the PHX flight is doing very well. The convienetn time allows you to connect to many(at least 10) west coast cities. I wouldnt be suprised if we got a 2nd n/s sometime this year. Weight restrictions do not apply but i did hear they if they start PVD-LAS that weight restrictions would apply. However being only 40 miles further, i think the route would be popular enough and they would be so minor that they might run one eventually or at least sat. only. But as far is PVD is concerned PHX is the farthest we can go untill the crosswind is lengthened to 7,500-8,100 ft which remains a strong possibility in a few years.
Experience is what you get when what you thought would work out didn't!