Finding through tags

Findability with tags: Facets, clusters, and pivot browsing by Rashmi Sinha (July 27) - Sinha considers three types of browsing: facets such as at wine.com; clustering and recommendations; and "pivot browsing" -- "When everything (tag, username, number of people who have bookmarked an item) is a link, you can use any of those links to look around you. You can change direction at any moment. Its a lightweight browsing mechanism, less structured and more freeform than browsing traditional hierarchies or even browsing faceted systems."