Notes:

A JavaScript and Python blog by twitter engineer Ben Cherry that makes good use of new HTML5. Each article has its own header and time.

I would have put the “filed under” div that appears below each article inside the article as a footer, as it contains information about its nearest ancestor sectioning element.

The comments on each article could also go into articles as specifically mentioned in the spec, although I appreciate that they are handled by a plugin here.

Could also have used small and input type="search" in the footer.