Diamond Age

Technologists are forging ahead regardless. New super light material, might even be able to make it out of diamond, hence stealing the title from Neal Stephenson's book. Via Roberta X.

They claim it is lighter than air, but then it is mostly empty space, which is filled with air. I wonder what would happen if you wrapped it with saran wrap and then pumped all the air out. Would it be able to maintain its' structure and actually become lighter than air? Or would the outside air pressure crush it flat, or just enough to make it heavier than air? I like the idea of vacuum balloons.