I don't normally wish misfortunes on other authors. I really don't. But when Chris Anderson got his XBox 360 two days ago, I thought, "Well, well, well, now let's see who gets their WPF book out first." I'm not a gamer myself, but I've heard that these boxes tend to be somewhat habit forming.
Alas, he's given it away. I suppose he actually will finish the book after all.