Fun with Hierarchical Controlled Vocabularies
Very cool, and could be very useful when everyone cools down from "OMG tags!" syndrome. Tags are great, and "folksonomies" are neat but I think, and surely others do too, we will not truly see tags shine until we combine and integrate them with other data classification, storage and retrieval systems... including oh-no-so-rigid hierarchies... and oh-my-so-soft full content indexing...
Time to dig up that data management graphing project I was beating myself about the head with last fall...