AUTH URL

http://www.facebook.com/login.php?api_key=API_KEY_HERE&next=http://www.facebook.com/connect/login_success.html&return_session=true&req_perms=offline_access,publish_stream,read_stream,email,create_event,rsvp_event,sms,status_update,photo_upload,video_upload,create_note,share_item

Facebook.rb

require 'rubygems'
require 'digest/md5'
require 'json'
require 'net/http'

class Facebook
  public

  # This is it.
  def self.callMethod(methodName, args={})
    args ||= {}
    args.each_pair {|key, value| args[key] = jsonify(value) }

    args['v'] = '1.0'
    args['format'] = 'JSON'
    args['method'] = methodName
    args['api_key'] = @@apiKey
    args['session_key'] = @@sessionKey
    args['call_id'] = (@@call_id += 1)
    args['ss'] = true
    hashString = args.keys.sort.map{|key|
      "#{key}=#{args[key]}"}.push(@@sessionSecret).join
    args['sig'] = Digest::MD5.hexdigest(hashString)
    res = Net::HTTP.post_form(
      URI.parse('http://api.facebook.com/restserver.php'),
      args)
    JSON.parse(res.body.to_s)
  end

  @@apiKey = '6441b756e04e4b556084f1ebae7957d2'
  @@sessionKey = '2.Kq_eNpy1bknRvWDp26FNbw__.86400.1247101200-688626964'
  @@sessionSecret = '2zEok7ee_84opK2_ihuFSw__'
  @@call_id = Time.now.tv_sec

  private

  def self.jsonify(item)
    if (item.class == Hash)
      item.each_pair {|key, value|
        item[key] = jsonify(value)
      }
      item.to_json
    elsif (item.class == Array)
      item.map{|entry| jsonify(entry)}.to_json
    else
      item
    end
  end
end

stream_growl.rb

require 'Facebook'

# Get the stream

# List of all posts known about
known_posts = Array.new

# Loop and repeat our fetching
loop {
  # Fetch the stream and delete those already known
  stream_data = Facebook::callMethod("fql.multiquery", {
    'queries' => {
      "stream" => "select post_id, actor_id, created_time, " +
        "target_id, message, attachment, comments, likes " +
        "from stream where filter_key = 'nf' order by created_time desc",
      "friends" => "select uid, name, pic_square from user " +
        "where uid in (select actor_id from #stream)"
  }})

  # Map array into hash with name => key, fql_result_set => value
  stream_hash = Hash.new
  stream_data.each { |stream_result|
    stream_hash[stream_result['name']] = stream_result['fql_result_set']
  }

  # Map out friends into hash by uid
  friends = Hash.new({"name" => "Unknown"})
  stream_hash['friends'].each { |friend|
    friends[friend['uid']] = friend
  }

  # Remove those entries already shown
  stream_hash['stream'].delete_if{ |stream_entry|
    known_posts.include?(stream_entry['post_id'])
  }

  # Add these new entries to the list of known ids
  known_posts = known_posts.concat(stream_hash['stream'].map{ |stream_entry|
    stream_entry['post_id']
  })

  # Create profile pics dir, and fetch photos
  Dir.mkdir("profile_pics") unless File.exists?("profile_pics")
  friends.each_value { |friend|
    next unless friend['pic_square']
    next if File.exists?("profile_pics/#{friend['uid']}.jpg")

    `curl "#{friend['pic_square']}" > "profile_pics/#{friend['uid']}.jpg"`
  }

  # Growl entries
  stream_hash['stream'].each { |stream_entry|
    puts stream_entry['message']
    `growlnotify -m "#{stream_entry['message']}" -t "#{friends[stream_entry['actor_id']]['name']}" --image "profile_pics/#{stream_entry['actor_id']}.jpg"`
  }

  # Wait before doing it again
  sleep 30
}