(first Q&A lifted from my journal. In case people were wondering.)
Q: So if we've read past chapter 1, we can't talk about chapter 1 on that discussion thread? If I've read all of the book, must I talk about chapter 1 in the chapter 20 post?
A: The idea is to keep spoilers out of the chapter threads -- so if you're talking about stuff that happens in chapter 1 but relates to information we learn in chapter 20, that would go in chapter 20. If you're just talking about the events of chapter 1 (or on a reread, like a lot of people are), that would go in chapter 1.