Jed, the NaNo site is a really simple process. You just copy your words and paste them into a counter. So when you go to count your November words, just start your cursor at Chapter 21 (or wherever you started writing on Nov. 1) in your static item or Word document or wherever you're storing your work, and copy to the end. Dump that into the counter, voila. You have your word count.

Regards,
Michelle