cheat sheets.

Flog tool (http://ruby.sadi.st/Flog.html)
$> sudo gem install flog

$> find some/dir -name "*.rb" | xargs flog

Tarantula spider
(http://blog.thinkrelevance.com/2008/2/26/tarantula-vs-your-rails-app)
$> git clone git://github.com/relevance/tarantula.git vendor/plugins/tarantula