How about a service with js commenting that alerts a trusted server of the comment? Server grabs the static html, appends the comment, pushes the new html to s3, bada-bing-bada-boom.
You don't need to even do it with javascript you just need to have a form that submits to your server (like say through a cgi script) which then updates the static file on s3.
Phase 1: Everyone has a static page, without JS, but with animated gifs, counters and guestbook scripts linked from other sites.
Phase 2: PHP becomes popular, static sites are suddenly 'lame', as everyone wants to show off their server-side skills. For some sites, even the CSS and JS, and images are generated dynamically on the fly.
Phase 3: Improvements to JavaScript make it possible to replace server side HTML, image and style generation with the same on the client side.
Phase 4 == 1: You don't need Javascript, simply re-generate the HTML and re-publish it on the site using a script. Sites integrate externals widgets, but somewhat less clunky than before by using JS tricks instead of iFrames.
Hell we've even got sites like Gawker re-implementing frames in JS so they can get all that '90s annoying-ness while still telling themselves they're on the cutting edge.
