"Undermining my electoral viability since 2001."

Daily Kos Embraces Folksonomy

Markos, always on the edge.

FWIW, I'm planning to do the same for most of my projects ongoing. While taxonomy (top-down categorization through hierarchy) is still really useful for putting some structure around your data, in terms of allowing people to find relevant content quickly and/or to effectively contextualize information, folksonomy (bottom up categorization through tagging) offers a great deal more performance.