campfire_wootbot.rb

require 'rubygems'
gem 'httparty', '= 0.4.3'
require 'httparty'
require 'tinder'
require 'feedzirra'
require 'nokogiri'

current_woot = nil

woot_url = 'http://woot.com/Blog/Feed.ashx'
subdomain = 'your_subdomain'
token = 'your_token_goes_here'
room_name = 'your_room'
post_images = false
post_to_campfire = true

campfire = Tinder::Campfire.new subdomain, :token => token
room = campfire.find_room_by_name room_name

while true

  feed = Feedzirra::Feed.fetch_and_parse(woot_url)
  woot = feed.entries.shift

  while woot.categories.first != 'Woot'
    woot = feed.entries.shift
  end

  if woot && current_woot != woot.url

    html_doc = Nokogiri::HTML(woot.summary)

    image = html_doc.at_css("img.thumbnail")
    image_url = image['src'] if image
    new_woot = "WootBot: #{woot.title} - #{woot.url}"

    if post_to_campfire
      room.speak new_woot
      room.speak image_url if image_url && post_images
    end

    puts new_woot
    puts image_url

    current_woot = woot.url
  end

  sleep 30
end

consider it done! also filtered out regular blog posts