gistfile1.rb

map.connect 'questions/:id/:tags/:question',
    :controller => 'questions',
    :action => 'show',
    :tags => 'question',
    :question => nil

module ApplicationHelper
  def question_path(question, extra_params=true)
    options = {}
    if extra_params
      options[:tags] = question.keyword_list.join('-').downcase.gsub(/\s+/, '-') unless question.keyword_list.blank?
      options[:question] = question.question.split(/\W+/).join('-').downcase unless question.question.blank?
    end
    options[:only_path] = true
    options[:controller] = 'questions'
    options[:action] = 'show'
    options[:id] = question.id
    url_for options
  end
end