We definitely need more rich mark up that’s parseable and usable. I’m not sure that additional HTML tags would necessarily be taken up heavily to be of much use.
I do like having some solid microformats on my own content and it works out well with many of the parsing tools that I use regularly for consuming content. I’m curious what Dries has tried out in terms of options he’s dogfooded into Drupal? I do notice that when my website parses his article, it does pull in more data than most sites I come across. The one thing my parser didn’t find was his avatar in the “correct” place. It popped up as a page photo rather than an avatar for him as an author.
Putting microformats into Wikipedia seems like an interesting idea. Anyone want to manually add microformats to tbl’s Wikipedia page? 🙂