There was such a large crowd in Portland. We didn't get out until 11:30pm, and they were nowhere near done when we left. And yeah, he was super nice. Brandon Sanderson is an exemplar in the author-mixing-with-fans situation, whether online or offline.
Posting so this comes up in my subscribed threads. :) I'll be back before the deadline with the first fifteen chapters! So excited; this is my favorite fantasy book and I've been meaning to re-read it.