I had to miss out on Harry Halpin’s talk at Duke recently. Not to worry; he sent a link to his slides. He’s into the Semantic Web, Microformats, Folksonomies vs taxonomies, and gives a great overview and discussion.
Harry being a web guy doesn’t use PPT; these slides are a lovely read right in your browser with no ugly download or proprietary reader required. There is one wonderful link to a YouTube video about Trust which relates to Harry’s work.
The talk is titled “The Next Generation of the Web” but there is more there there than in most talks of that name.
NOTE: Harry is an ibiblio contributor.