Can you engineer a design that would reduce the loads to the point you don't need exotic materials? That sounds cheaper... But not as sexy as Unobtainium

SPEAKING OF toxic materials, I just heard that Russian spy who died was poisoned by an exotic material (Polonium 210??) made from Bismuth exposed to neutrons. not sure if I heard it right, but one milligram is more than enough to kill...

So all that cloak and daggar stuff isn't all fiction... <img src="http://www.catsailor.com/forums/images/graemlins/shocked.gif" alt="" />