Hardware Guy--Today they came with the backhoe that has the rock borer attached (I'm sure this isn't the real name of it, but hope you know what I mean). We were hoping that once they got through the two visible boulders, that would be about it, but it looks like it's pretty solid bluestone. They worked for about 6 hours and made their way through about 2/3 of the pool (haven't hit the deep end yet!); when the bit broke! Coming back tomorrow with a new bit, and hopefully they'll be able to finish up. They said with the kind of rock we have, blasting would be the best solution, but unfortunately not allowed to...
Good luck with your rock...make sure you have a good pair of earplugs and start buttering up the neighbors (I sent mine a fruit basket from Edible Arrangements!)
As an interesting aside in our adventure, after the work crews left today, the cops showed up. Seems a Bobcat in one of the neighboring construction areas was stolen and they were pretty convinced we had it. Fortunately, serial number didn't pan out!