When using a dvorak keyboard this file may be of help to you.
These mappings have been made by Lawrence Kesteloot <kesteloo@cs.unc.edu>.
What they do is that the most often used keys, like hjkl, are put in a more
easy to use position.
It may take some time to learn using this.

Put these lines in your .vimrc:
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" Key to go into dvorak mode:
map ,d :source ~/.dvorak
" Key to get out of dvorak mode:
map ,q :source ~/.qwerty
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write these lines into the file ~/.dvorak:
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" Dvorak keyboard, only in insert mode and ex mode.
" You may want to add a list of map's too.
imap! a a
imap! b x
imap! c j
imap! d e
imap! e .
imap! f u
imap! g i
imap! h d
imap! i c
imap! j h
imap! k t
imap! l n
imap! m m
imap! n b
imap! o r
imap! p l
imap! q '
imap! r p
imap! s o
imap! t y
imap! u g
imap! v k
imap! w ,
imap! x q
imap! y f
imap! z ;
imap! ; s
imap! ' -
imap! " _
imap! , w
imap! . v
imap! / z
imap! A A
imap! B X
imap! C J
imap! D E
imap! E >
imap! F U
imap! G I
imap! H D
imap! I C
imap! J H
imap! K T
imap! L N
imap! M M
imap! N B
imap! O R
imap! P L
imap! Q "
imap! R P
imap! S O
imap! T Y
imap! U G
imap! V K
imap! W <
imap! X Q
imap! Y F
imap! Z :
imap! < W
imap! > V
imap! ? Z
imap! : S
imap! [ /
imap! ] =
imap! { ?
imap! } +
imap! - [
imap! _ {
imap! = ]
imap! + }
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write these lines into the file ~/.qwerty
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" Qwerty keyboard
unmap! a
unmap! b
unmap! c
unmap! d
unmap! e
unmap! f
unmap! g
unmap! h
unmap! i
unmap! j
unmap! k
unmap! l
unmap! m
unmap! n
unmap! o
unmap! p
unmap! q
unmap! r
unmap! s
unmap! t
unmap! u
unmap! v
unmap! w
unmap! x
unmap! y
unmap! z
unmap! ;
unmap! '
unmap! \"
unmap! ,
unmap! .
unmap! /
unmap! A
unmap! B
unmap! C
unmap! D
unmap! E
unmap! F
unmap! G
unmap! H
unmap! I
unmap! J
unmap! K
unmap! L
unmap! M
unmap! N
unmap! O
unmap! P
unmap! Q
unmap! R
unmap! S
unmap! T
unmap! U
unmap! V
unmap! W
unmap! X
unmap! Y
unmap! Z
unmap! <
unmap! >
unmap! ?
unmap! :
unmap! [
unmap! ]
unmap! {
unmap! }
unmap! -
unmap! _
unmap! =
unmap! +
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