On YUIBlog.com the article/post titles and the section headers within the article are both h2 and styled identically.... it's hard for me to scan through the front page quickly (where one article ends and another begins).
Maybe it's just me, but I'd love to see use of h3 for the section headers instead of h2... and something (size/color) to differentiate the two.
PS - not sure this is in the right place, but I didn't want to post a comment directly on the blog because it would be irrelevant to that specific post (and no one likes seeing complaints )
I just pushed out an update to the blog's CSS. The markup still over-uses H2s, but for the short term I've made them visually distinct and going forward we'll use H3s within the content saving H2s for the headline.