Social Computing / Tagging

http://shirky.com/writings/ontology_overrated.html
http://www2006.org/programme/files/pdf/p139.pdf
http://eprints.rclis.org/archive/00005703/
http://www.dlib.org/dlib/january06/guy/01guy.html
http://arxiv.org/abs/cs.DL/0508082