I started to use Vimperator for navigation through the Web, but one of it's useful feature — call for external editor (via shortcut Ctrl-i), to edit textareas, does not work with GVim, if GVim was installed from MacPorts.

The problem is in the /opt/local/bin/gvim script, which actually fork GVim and obey any options like --nofork.

Here is a small script, which start GVim with 'nofork' options. Place it somewhere in ~/usr/bin.

#!/bin/sh
binary="/Applications/MacPorts/Vim.app/Contents/MacOS/Vim"
exec "$binary" -g -f ${1:+"$@"}

Next setup Vimperator 'editor' option:

:set editor=~/usr/bin/gvim_nofork