Well, I've gotten large parts of The Pytheas Club written already--the intro, the club section, the sample adventure, and the sample PCs. I've also got several appendices. The big hunk of work that I have to do next is going to be writing the world section, what there is and what's going on politically, culturally and scientifically (And no, Sherlock Holmes won't be written for another 10 years at least.)
I think I'm going to put a timeline in this one that shows when certain things happen in relation to the game.