I agree. I've become less impressed by the layout in the past year. I haven't bothered to change it yet, tho I probably should. I should mention the typematrix supports hot swapping to normal dvorak on a whim, which is a nice feature.
Programmer dvorak comes with most linux distros, as it turns out. But it isn't available by default outside the X window system, which gives me problems occasionally when I have to fix or install Arch Linux.