There's a lot more that the language of Vim can do than what's in this article. You should check out this screencast on vi/vim's command/text equivalence (analogous to LISP's code/data equivalence):
http://blog.extracheese.org/2010/11/screencast-custom-vim-re...
Also, this thread's article doesn't go into keys like ftFT;,#* or the incredibly useful Vim-specific feature called text objects. This gives a good introduction to a lot of that: http://www.viemu.com/a-why-vi-vim.html
Also, this thread's article doesn't go into keys like ftFT;,#* or the incredibly useful Vim-specific feature called text objects. This gives a good introduction to a lot of that: http://www.viemu.com/a-why-vi-vim.html