I made the switch to Dvorak over a 2-week holiday break just under 10 years ago. I may have eventually boosted my speed marginally, but I <i>can</i> say my hands don't get tired or sore typing for long periods as they did on Qwerty.<p>The only con I've run into is when I have to use somebody else's computer, like during a presentation in a meeting and I end up basically hunting and pecking on Qwerty. I get looks like, "this guy is a developer?" One time when I explained I was a Dvorak keyboardist, a participant asked if I also spoke Esperanto. (I don't.)<p>However, I highly recommend the switch just for the brain-remapping experience. Going through the learning process literally feels like a mental rewiring.