Are they worth the price?
It depends of course.... but generally, no.
Compared to most other good coffees, they might come in slightly better. They might come in worse as well, it's going to change from year to year, no matter what you do. (there's also some question to where the coffee literally comes from... not all farms, even in the same region are created equal) There's probably more honesty in Kona coffee right now than Blue Mountain, but you're still talking about coffee that costs 2-3 times more than most, for a largely minor upgrade in flavor. I know that one of the issues with Blue Mountain is that the region has indiscriminately "grown", meaning that a wider range of coffee can be labeled the same way. Basically, everyone was trying to get in on the cash cow.
For my money, there are many more modestly priced coffees that are just as good if not better.
For those of you who do like your ultra premium coffee, Morecoffee is going to be offering Cof269: Ethiopian Amaro Gayo. It's going to come in at a slightly premium price next week, (9.40ish a lb) but it really is worth it. It doesn't quite have the name recognition that Kona or Blue Mountain has, but that's a good thing sometimes. Expect the sort of wild fruit flavor you get from most ethiopians... but a little more refined and smooth. It's pretty darned good coffee. And at half or 1/3 the price of Kona/Blue Mountain.... not even a contest.