追記：Production パーサ

上記コードの最後に

sankei.export(__FILE__)

を追加して実行し、出来たのが以下。

require 'rubygems'
require 'scrubyt'

sankei = Scrubyt::Extractor.define do
   mechanize = WWW::Mechanize.new
   mechanize_doc = mechanize.get(NEWSFLASH)
   mechanize_doc.body = NKF.nkf('--utf8', mechanize_doc.body)

  fetch(NEWSFLASH, mechanize_doc)

   record "/html/body/div/div/div" do
     title "/p[2]/span[1]".toutf8
     time "/p[1]"
     (abstract "/p[2]").toutf8
  end.ensure_presence_of_pattern('abstract')

end

sankei.to_xml.write($stdout, 1)