Richard Pachter made an excellent point, and honestly, I was planning on doing this BEFORE the FAQ came out, but just plum forgot.
Here are a list of great annotations of Final Crisis, as well as links to Grant Morrison's Newsarama interviews for Final Crisis (plus his exit interview at Newsarama and IGN).
Newsarama interviews with Grant Morrison
I have no idea how to link to Dan Didio's 20 Answers, 1 Question thing he does on Newsarama. Does it have a category I can link to? Not every installment is on point, but a lot of them are.
Over on IGN, Dan Phillips did a great post-Final Crisis interview with Morrison which you can read here