munin.conf

# in /etc/munin/munin.conf

contacts campfire
contact.campfire.command | /web/scripts/alerts /web/scripts/alerts
contact.campfire.always_send warning critical

munin_alert.rb

#!/usr/bin/env ruby
# a quick script to paste Munin alerts on Campfire

require 'rubygems'
require 'tinder'

campfire_url = 'something'
campfire_login = 'person@email.com'
campfire_password = 'sekret'
campfire_room = 'Talk'
campfire = Tinder::Campfire.new campfire_url
campfire.login(campfire_login, campfire_password)
room = campfire.find_room_by_name(campfire_room)

for line in $stdin
   room.speak line
end