Peterme talks about a demo called FacetMap that was created to illustrate/discuss how one might browse entities indexed using faceted classification. See comments on Peter's site.

    Recently I started to address an apparent discontinuity in IA, which was: How to combine faceted classification, regarded as a "bottom-up" system, with the hierarchical navigation that's typically considered a "top-down" structure, thereby giving (unsuspecting) users much more power over their browsing.