[jessedhillon]

The content can be served as a JSON object containing just the post and the metadata. If you scale up to millions of requests, suddenly you're saving a lot of bandwidth by not sending the same header, sidebar, footer etc everytime.

[e12e]

1) You could send the sidebar, footer etc as json, and the content as html. [edit: an by json I mean javascript ;-) or a combination of a script-tag with a fancy-nav.js, and then pull in any additional elements via json/javascript urls]

2) "lot of bandwidth" - I doubt it. It's only the embedded html you'd have to resend -- and that gets compressed with the rest of the main html document. Everything else (images, css, javascript) gets cached via normal request caching.

[pandeiro]

Just send binary (that next?)