GrafRank: Global Graffiti Statistics is a new webapp project from Jake Dobkin of Streetsy (previously). With GrafRank, Dobkin codes street art locations from the Streetsy Flickr Pool, tagged by artist, to highlight where notable street artists are working in specific cities, their prolificacy, and the more popular areas in those cities for tagging.
Photosynth. Blaise Aguera y Arcas (second one down) does a live demo (with some subtle humor) of the product we've discussed previously. Via the wonderful Ted (mentioned a few times).
Recently we've all been thinking about flat (or better, faceted) hierarchy web apps that organize email, photos, bookmarks, and general knowledge. The common threads are metadata (tags, categories, labels) that enrich relationships within and hence searchability of large collections. But besides marketroid hype (buzzwords, snark) and a computer that plays Twenty Questions what else can we do and study using faceted data structures: searchable culture references in The Simpsons, library science, computer filesystems, A.I. development, models for human memory and cognition?