My questions-
Who here has heard of Dvorak?
It's on old "keyboard language" that obviously pre-dates the QWERTY system. DVORAK used to be the standard before end of the 19th century but due to the design of the typewriters, the speed of the typist using the DVORAK keyboard system would often jam the mechanical type face arms and obviously it would hurt productivity as the typist was out of action until the keys were unjammed. Some newpaper printer came up with the QWERTY system as a way to improve productivity by forcing the typist to type slower which would then lessen the likelihood of down time.
Obviously, the jamming issue was only a problem with mechanical typewriters and now with computers and such, it's no longer an issue
Who here uses it?
I don't use it, really never did but I did have to learn it when I was a kid taking computer classes in the early '80s. My Apple IIc even had a switch on the keyboard to switch from QWERTY to DVORAK but it was a pain in the bellybutton since the physical layout of the Apple IIc keyboard was QWERTY and unless you knew by memory where the DVORAK keys were layed out, pretty much impossible to use.
What are your opinions on it?
No thoughts really, I really don't find it any more efficient or productive over the existing QWERTY system.
Is it possible to know both layouts for versatility and speed?
You would be better off sticking to one style and instead of mixing them. All you do by doing that is increase the likelihood of making typing errors and ultimately lower your productivity and efficiency.
How do I set it up for Vista?
You'll need a keyboard that is layed out for DVORAK.