snakify.rb

#!/usr/bin/env ruby

gem 'activesupport'
require 'active_support/core_ext/string/inflections'

camel = ARGV.first
snake = camel.underscore

system %{git grep -l #{camel} | xargs ruby -p -i -e '$_.gsub! /#{camel}/, "#{snake}"'}

# snakify.rb myVariable
# snakify.rb myOtherVariable
# ...
# git status
# git commit -am "Standardized to Awesome naming convention."

Cool. Just run it on this: http://api.jquery.com and this: http://backbonejs.org/ and this: http://underscorejs.org/ and we're good to go.