gistfile1.rb

require 'rubygems'
require 'twitter' # sudo gem install twitter --#-- http://twitter.rubyforge.org/
require 'open-uri'
require 'eeml'  # sudo gem install Floppy-eeml --#-- http://github.com/Floppy/eeml-ruby/tree/master

loop do
  # Pull in feed from pachube
  data = REXML::Document.new(open("http://www.pachube.com/api/YOUR_FEED.xml?key=YOUR_SECRET_KEY")).to_s
  
  # Parse the data
  amount = EEML::Environment.from_eeml(data)[1].value
  
  # Post to Twitter
  Twitter::Base.new('dothegreenthing', 'PASSWORD').update("Twitterplug reading #{message} watts")
  
  # Repeat every 5 mins
  sleep(300)
end