I agree, I had the same problem: I started reading it some months ago but not with the right attitude to do everything, complete it etc.. and then I stopped (not because of lacks in the tutorial but because of me). Now i'm attending Coursera's Saas Class and I'm sort of forced to do stuff in order to complete homeworks (so i started using git, registered on github and heroku etc..) I think that after the course I'll come back to this new version of the tutorial, Thanks Michael!