gistfile1.rb

task :cache => :environment do
  hydra = Typhoeus::Hydra.hydra
  Site.all.each do |site|
    fork do
      Locality.each_url(site.webservice_connection) do |url|
        req = # build request
        hydra.queue
      end
    end
  end
  hydra.on_complete do |response|
    if response.success?
      LocationCacher.cache(response.body) # can give you headers too if you need 'em
    else
      # panic! hoptoad etc.
    end
  end

  hydra.run
end