Maybe you know more than me about it. I had read that a giant deposit is just begging for use on the moon, a more concentrated form of fuel than anything used yet.
Not to my understanding. The moon does have a lot of He3, but it has been deposited over the past megayears by the solar wind, and so is pretty evenly distributed across the top layer at relatively low levels (multiple ppb). Still far higher than any amount available on earth, but nothing in comparison to boron, which we have lots of, and readily available.
The importance of He3 seems to be that it is the only aneutronic reaction that "might" be doable in a Tokamak (p-B cannot be done in one, as the containment is not good enough). The Bussard Polywell can, in theory, be driven high enough to do p-B, and there is a test planned on the next WB (wiffleball) prototype to try it out, along with getting more data on the scaling laws of D-D in the polywell.