A short note of thanks to folk who have written in and donated. I will write a few words about my gadget choices when I find the time to actually get them...
Via André, this article neatly summarizes how I keep on going (I tend to zone out by doing diagrams and tweaking page layouts and fonts - i.e., the closest to graphics design you can do inside Office). Which, as it happens, is what I will most likely be doing through the night.
I also annoy the hell out of my colleagues as a channeling exercise. :)