# route
map.sitemap 'sitemap.:format', :controller => 'main', :action => 'sitemap'

# main controller
class MainController < ApplicationController
	caches_action :sitemap

	def sitemap
		@posts = Post.find(:all, :include => :comments)
		respond_to do |format|
			format.xml
		end
	end
end

#
# the cached file is created with a double format :(
# sitemap.xml.xml.cache
#