Check out shurtugal.com's question and answer with Christopher Paolini, author of the Inheritance Cycle (Eragon, Eldest, Brisingr...).
I thought the Q&A was pretty good, but he does get on my nerves sometimes with all the 'No, I can't tell you that...'.
Oh, well. I guess we will just have to wait until Book 4 comes out to get the answers to our most important questions.
Sé onr sverdar sitja hvass!