Third order almost sounds like a plan for world semantic domination. I'm hooked. This skinny book gave me some big ideas about how my introduction to cataloging course will feed into the metadata courses I'll take. Gave me a bird's eye view (with some specific examples) of how the semantic web can be put to use for users. I'm starting to use Delicious, just to play around a little. Really excited about how Ranganathan applies to librarians' work on the web. Really great read for librarians, information professionals, or just social media users.