This could be quite the double-edged sword, if we choose to use it against the 'nids.  It sounds like the perfect weapon against a race that feeds on biomass to sustain its numbers, but if they<em>did</em>find a way to incorporate the stuff into their genetic code we could all be well and proper<em>hosed</em>.  I don't know about you, but the 'nids are scary enough<em>without</em>being able to shoot lethal streams of alien-super-glass.