At Stack Overflow we use slugs for this approach, http://stackoverflow.com/questions/427102 http://stackoverflow.com/questions/427102 http://stackoverflow.com

At Stack Overflow we use slugs for this approach, http://stackoverflow.com/questions/427102 http://stackoverflow.com/questions/427102 http://stackoverflow.com/questions/427102/what-is-a-slug http://stackoverflow.com/questions/427102/what-is-a-slug etc, will all redirect to the canonical: http://stackoverflow.com/questions/427102/what-is-a-slug-in-django http://stackoverflow.com/questions/427102/what-is-a-slug-in-... If the title changes we update the slug and redirect with a 301 to the new canonical