> But what's also fun is that the brain seems to associate layouts with the actual computer -- if I was typing on a school computer, I'd start typing in qwerty without even realising it. Then, when I came home and continued behind my own PC, I continued in dvorak.

I've noticed the same thing, but on a smaller scale: I use a Mac at work, but a PC at home. I have the same keyboard model (a Logitech wireless) in both locations. When I type on the Logitech model on the PC at home, I find myself hitting Alt (which is mapped to Cmd on my Mac) when I mean Ctrl. However, I don't have that problem when I use my PC laptop. It's interesting how the brain makes those associations.