Having started on Dvorak, and then forced in to QWERTY for school purposes, I enjoy being back on Dvorak.
And while it is tedious, Freespace can be re-mapped to utilize the Dvorak layout rather well. If it would just take the OSes Regional and Language settings in to account, that would be more for teh win, but apparently (like most improvements seem to be getting these days) it would require breaking the pilot files code some.
The down side for converting a Qwerty keyboards are:
Either having removable keys that do not have funky grooves for the home row keys, or overlaying stickers on them.
(EX: Logitech are easy to move the keys around on. Saitek and half the M$ keyboards are not)
In BIOS or DOS window environments, because the ASCII character pins on the ROM are still sending Qwerty signals, you still have a Qwerty keyboard in these environments. Some keyboards, this can be corrected on. Such as the G15, which is what I am using.
I don't know what my previous Dvorak typing rate was, but my Qwerty was at it's highest @ ~90wpm error free. It is now closer to ~125. I rarely can manage to type that fast when in a free form conversation because of the nature of how my brain works, but it comes in handy any way.