sudo.vim

  http://www.asahi-net.or.jp/~wv7y-kmr/note/2004-10.html#YMD20041031_Vim

- sudo.vim - Allows one to edit a file with prevledges from an unprivledged session.
  http://www.vim.org/scripts/script.php?script_id=729

  これは結構便利かも