I don't know--entering \Phi isn't that bad. You don't need the {} bit, which would be annoying to type. With a clever editor (Emacs) you can even automatically

I don't know--entering \Phi isn't that bad. You don't need the {} bit, which would be annoying to type. With a clever editor (Emacs) you can even automatically complete it most of the time, so it isn't a real issue. It's also certainly easier than learning a new keyboard layout (KDE actually offers a keyboard for APL, for example) as long as you're not going to be using too many special characters.