Tim Bray - The Real AJAX Upside:

"Pretty well all Web-publishing software does lots of templating and dynamic page generation, and pretty well all of it is piggish, stressing out servers (and, to be fair, representing a pretty good business opportunity for my employer). I suspect there’s a huge system-wide optimization waiting out there for us to grab, by pushing as much of the templating and page generation work out there onto the clients."