How TextDrive does both PHP and Rails FCGI in one thing-a-ma-bob
fastcgi.server = ( ".fcgi" => ( "localhost" => ( "socket" => "/tmp/textdrive-new.socket", "bin-path" => "/users/home/website/web/public/dispatch.fcgi", "bin-environment" => ( "RAILS_ENV" => "production" ) ) ), ".php" => ( "localhost" => ( "socket" => "/tmp/textdrive-php5-fcgi.socket", "bin-path" => "/usr/local/www/cgi-bin/php5-fcgi", "bin-environment" => ( "PHP_FCGI_CHILDREN" => "4", "PHP_FCGI_MAX_REQUESTS" => "5000" ) ) ) )