Bismuth is definitely used in pharmaceuticals like bismuth subsalicylate (Pepto Bismol, the pink stuff used for upset stomach), and for some reason there's a tiny voice ringing in my head that it might also be used in nuclear medicine--but in any case, I still had no idea that demand for it had grown.

And gallium....man, I was just re-reading Plastic Fantastic, a book about the physics fraud Jan Hendrik Schon (I don't know how to put that pair of electrons over the 'o' in his last name, as he's from Germany, lol) and early on there was mention of research being done with copper gallium selenide.  The physics of it has to do with n-type conduction, which is way beyond anything I studied in physics when I was in college, but my point is that it was studied decades ago by researchers in the semiconductor field and by this point might have actual utility in electronics--though that's just a guess on my part.

The above book is an excellent one, by the way, even if it goes back a few years.