I follow the delicious tag for taxonomy, and it’s interesting to see how different people discover the same things at different times. Different communities too. For example, the library scientists discovered facets in the 1930s, then, recently, the academics discovered their usefulness for the web with the experiments around Flamenco. The IA community discovered Flamenco around 2003-ish (if memory serves me), and epinions and there was a lot of discussion, blog writing, creating of mailing lists and xml formats and such. Now, the tagging community (which overlaps somewhat with the IA community, but not totally, at all) is rediscovering facets and figuring out if they can use it in their practices in some way.
It’d be interesting to have some kind of analysis of WHO is tagging in delicious, cluster that and through that analyse which community are discussing which concepts, and how concepts move between communities.
Sometimes I write up these ideas without all the links a good blogger would add. Oh well.