This subject has been somewhat beaten to death over at the colemak forums:
There are a number of listed links to
I feel Shai's own script is going way too far - doing way more than just integrate Colemak into vim (remapping C-w to Close Tab e.g., showing some bias towards tab-oriented editors, people have complained about in-/exclusive motions (diw, daB etc) not working any more etc).
I guess the best advice, as has been given before is to stick with the defaults and do:
Keyboard bindings for Vim
Vim is an extremely efficient text editor that I use for writing emails and
editing any sort of text file. Vim's commands are all controlled from the
keyboard: 'd' for delete, 'w' to move the cursor forward one word, 'dw' to
delete the text moved over by 'w', '2dw' to delete two words, etc.
Left/Down/Up/Right navigation is located on the QWERTY keys H/J/K/L so that
the typist's hands never need to reach for arrow keys or the mouse.
Unfortunately, these navigation keys are not so intuitive under Colemak and
so I needed to find some more appropriate mappings. After experimenting with
many alternatives, here is what I finally decided on and am very happy with:
noremap n j|noremap <C-w>n <C-w>j|noremap <C-w><C-n> <C-w>j
noremap e k|noremap <C-w>e <C-w>k|noremap <C-w><C-e> <C-w>k
noremap s h
noremap t l
noremap f e
noremap k n
noremap K N
noremap U <C-r>