The Interesting Link
Learn To Edit Semantic MediaWiki In 10-Minutes, a concise introduction by Harry Chen. And also on his blog the discussion of the Gartner Hype Cycle for Emerging Technologies 2006. Finally he also wrote a summary of the MetaCarta GeoParser API, a cool tool that can for example parse a website and return all the locations references in the text.
Then there is the interview with the inventors of microformats The Progress and the Promise of Microformats.