These all sound pretty damn cool. I do have some reservations about the first one though. I am down with the advancement of condom tech, but I don't understand how these will "evaporate." Also, how safely will it disperse? Will sex literally be in the air? It reminds me of that movie, Envy where Jack Black invents "Vapoorize".The result is a female condom that prevents pregnancy, guards against HIV transmission, and then evaporates within hours or days depending on how it's manufactured.
I worked on electrospun fibers at the UW Bioengineering lab back in '99. They'd been plunking with them for two years back then. At the time, the idea was that they'd make good lattices for cellular regrowth - the fibers were small enough that they weren't rejected by the body because they're too small for the immune system to see (kind of like asbestos, but not poky). I'm guessing they didn't quite get the results they were looking for; it'd be everywhere by now if they had. Best guess is it's been an idea in search of an application for fifteen years now.