textmate is great, but vim is greater. Vim can acts_as_textmate, but textmate can't acts_as_vim. To make your vim more kindly to rails development, you need some well-known plugins:

* gem i vim-ruby: <must have>
* rails.vim: <must have>
* grep.vim: fast locate the code in current directory
* minibufexpl.vim: show a buffer tab above your edit area
* surround.vim: hard to use, but sometimes useful. When you have lots of html work you need this to insert html tags quickly
* matchit.vim: it will help you to eliminate un-closed tags/blocks/etc.

And finally, I strongly recommend the very new plugin - FuzzyFinder - who comes with vim7's release. It's so useful and unbelieveable ignored by people ... You'll get the great fuzzy find & open function from this, like you open a file in textmate or intellij. MUST HAVE!

Dig more from my .vimrc:

set nocompatible          " We're running Vim, not Vi!
syntax on                 " Enable syntax highlighting
colorscheme vividchalk       "Textmate color scheme on VIM. Use GVIM to get the best looking
set guifont=Terminus\ 12    "Popluar terminal fonts in archlinux community
filetype plugin indent on " Enable filetype-specific indenting and plugins

" Load matchit (% to bounce from do to end, etc.)
runtime! macros/matchit.vim

augroup myfiletypes
  " Clear old autocmds in group
  autocmd!
  " autoindent with two spaces, always expand tabs
  autocmd FileType ruby,eruby,yaml,html,erb set si sw=2 sts=2 et
augroup END

let g:miniBufExplMapWindowNavVim = 1
let g:miniBufExplMapWindowNavArrows = 1
let g:miniBufExplMapCTabSwitchBufs = 1

nmap <leader>rci :%!ruby-code-indenter<cr>

"noremap <C-f> :TSelectFiles<cr>
nnoremap <C-f> :FuzzyFinderFile <C-r>=expand('%:~:.')[:-1-len(expand('%:~:.:t'))]<CR><CR>
nnoremap <C-o> :FilesystemExplorer<cr>