I've implemented this rev="canonical" idea on
   http://free.naplesplus.us in the hopes that it catches on
   further. It wasn't hard to put together. I followed the style
   used on php.net like so:
   http://free.naplesplus.us/articles/view.php/50574/colcourt is
   the original and in the header, I have: <link rev="canonical"
   rel="self alternate shorter shorturl shortlink"
   href="http://free.naplesplus.us/go.php/colcourt" /> which is the
   form used on php.net, which I happen to like, as it takes into
   account not only the rev=canonical, but ALSO the rel= self, or
   alternate or shorter or shorturl or shortlink ideas, which are
   ALSO excellent notions. If I wanted to go further, I will
   probably do a mod-rewrite to make the go.php into go But I
   figured since I had this GREAT nick-name system already in place
   that I was hardly taking any advantage of on my CMS (YACS - a
   little known system out of france), I might as well use it. It's
   not MUCH shorter (maybe 5-10 characters shorter at best - and
   some of them end up being LONGER) - but I figure that it's a
   beginning of a great idea! Ken Udut of Naples Florida