ついカッとなって書いたReeder for Macの新着未読を無理やりGrowlするRubyスクリプト（適当にcronに登録するなりsqlのwhere変えるなりしてください）

growl_reeder.rb

# -*- coding: utf-8 -*-

gmail = ARGV[0]
unless gmail
  puts "Usage: ruby growl_reeder.rb [gmail]"
  exit
end

require 'rubygems'
require 'tempfile'
require 'sqlite3'
include SQLite3

db_path = "#{ENV['HOME']}/Library/Application Support/Reeder/#{gmail}/reeder.db"
temp_db = Tempfile.new(db_path.gsub(/\//, '_'))
open(db_path) do |db_file|
  temp_db.print db_file.read
end
temp_db.close

db = Database.new(temp_db.path)

now = Time.now
since = now - (60 * 20)
milliseconds = (since.tv_sec.to_s + since.tv_usec.to_s).to_i

query = <<SQL
  select
    title
  from
    reader_items
  where
    unread = 1
  and
    published >= #{milliseconds}
  order by
    published desc
SQL

db.execute(query) do |row|
  title = row[0].gsub(/'/, '')
  `/usr/local/bin/growlnotify 'Reeder for Mac' -m '#{title}' -a reeder`
end