Okay, who went out and bought Lupfer's book? I did, and it arrived yesterday. I had just gotten home at 1:30, from a very late night out, and instead of heading off to bed, I sat at my desk and read the book! It's wonderful. I've been doing Hoang's practices at work, and I'm trying to decide whether to be good and continue practicing with a pencil (I can already feel things getting more natural), or jump ahead and start doing it with pen and ink. I think I'll try to do a few more days of pencil flourishes, and maybe graduate to pen-and-ink next weekend.
(I have a Really Big Thing to prepare for on Friday, and I don't want to get caught up in a new project before then.)