The Cornell Paper is pretty interesting. Skip to the section "Materials Challenges".
I know lots of traditionalists out there, but ya gotta admit, even if you don't eat it, trying to do it
just because you can is pretty interesting. Ok, I am one of those guys:
T2 "spoke" to me, cause I would have invented Skynet just to see what it did, and probably would have worked on the atomic bomb too. Classic engineer-sociopath I am. But it sure is fun!