I'm really happy right now. I got to go to the I.F. (Idaho Falls) signing, and ask Brandon a bunch of my questions. It was cool. And one of the things he said was quite interesting. Apparently Atium and Larasium can be alloyed with any Allomantic metal and each result is something different....I for one would like to know what each alloy would do. It would be fascinating.
I also discovered that Nicrosil can't do anything more for a person already burning Duralumin. I was slightly disappointed by this. I was hoping that if a Nicrosil misting burned Nicrosil at the same time a person burned Duralumin, it would double the effect of what was happening. Apparently not.....Interestingly enough, though, if a Soother with a Hemalurgic Duralumin spike (or with a companion who's a Nicrosil misting) came across Marsh in the next trilogy, he WOULD be able to take him over. That's cool.
Oh, and another thing I found interesting--there are Nicrosil and Chromium mistings running around at the end of HoA who have no idea that they're Allomancers, because of that mist-sickness.