google_contacts.rb

require 'rubygems'
require 'knock_knock'
require 'hpricot'

Bubble::KnockKnock::Connection.instance.connect('email','password', 'cp')
xml = Bubble::KnockKnock::Request.get('http://www.google.com/m8/feeds/contacts/username%40gmail.com/full', 'alt' => 'json')
doc = Hpricot::XML(xml)

(doc/:entry).each do |raw_item|
  name = raw_item.at('title').inner_text
  phone_item = raw_item.at("gd:phoneNumber[@rel='http://schemas.google.com/g/2005#mobile']")
  phone = phone_item && phone_item.inner_text
  puts "#{name} phone number is #{phone}"
end