[RJ]

The main advantage of the Dvorak keyboard is that it's easier for the hands, as you don't have to move the fingers all over the keyboard that much as with QWERTY, also Dvorak doesn't stress the weak fingers as much as QWERTY.
The change from QWERTY to Dvorak wasn't really difficult for me, but I needed to be patient. It took only 2 weeks until I was able to stop typing QWERTY and use Dvorak, but at low speed. It was a bit hard as I wasn't able to type fast, but I had to refrein myself from changing to QWERTY and type, but use Dvorak for practice, so that my Dvorak speed will increase.
Took about 1 month until I had a better speed, like 200 hits/min I believe.
A few months later I was back to my old QWERTY speed (learned QWERTY in 1997, btw), and I can't type QWERTY anymore. Thought that I might be able to type both, but it turned out that I just do Dvorak automatically.
Windows (dunno since when) includes the Dvorak layout, too, so you can easily change the keyboard layout of many computers.
When I need to type QWERTY, I have to look onto the keys, and well. . the fingers do move alot all over the keyboard, whereas with Dvorak, it's much more comfortable.

RJ