I honestly don't see the point in this. Like Teny suggested, we could just dig for frozen dihydrogen monoxide (
). Supposedly we're going to resume manned moon flights soon, with walks starting again in 2018 if I'm not mistaken. I also saw plans for a "moon base."
I say get mining equipment that can work in zero gravity/ zero oxygen environments and have at it. Just like underground coal mining here on earth, only different and hundreds of times more dangerous.