First a new Mistborn book, now this. Awesome.

The best part is that, as far as I can tell, Sanderson has had a ton of input on the game and the "flavor," so I guarantee there's going to be some interesting insights and background info about Mistborn that we've never seen.

(Sort of like the Dresden Files RPG, which I suggest fans take a look at even if they don't play RPGs- its written in the style of "Billy the werewolf made up a game for Dresden and Bob to make notes on so the public can be more informed about supernaturals," and there's a lot of cool stuff in there.)