I don't know how many pages it is, because each chapter is individually paginated; the guys at Kinko's only charged me for 300 pages. I do know that it is 73,073 words long. Turns out Liz & I are more prolific than we thought we'd be (we contracted for a 75K-word book, then asked to hand in a 50K word manuscript.)! Go, team!
I have a big post brewing about the whole book-writing process (a process that has really only begun -- we still have edits & galleys to work through before we're anywhere close to done). Still, this is a very good feeling.
UPDATE: 302 pages. Kinko's guys gave me a 2-page discount!