I’ve been dipping into 30 days to a more accessible weblog. I like it, but here’s the nitpick: yesterday was Day 17: Defining acronyms. There’s no mention of the <<abbr title="Abbreviation">abbr</abbr>> tag (Abbreviation), some of the acronyms should be marked up as abbreviations.
More on phrase elements from the specs, and more on <<abbr title="Abbreviation">abbr</abbr>> at htmlhelp.com.
Note: A postscript to the article now mentions the <<abbr title="Abbreviation">abbr</abbr>> tag.