Clay Shirky's has written //written up his interesting //talk about //folksonomy vs //ontology. For example about the Dewey decimal library system.

Dewey, 200: Religion

210 Natural theology

220 Bible

:

270 Christian church history

280 Christian sects & denominations

290 Other religions

How much is this not the categorization you want in the 21st century?

Alternatively but less entertaining there is Adam Mathes's //Folksonomies - Cooperative Classification and Communication Through Shared Metadata

If you are interested in [folksonomy], for example the implementation of del.icio.us, you will love extispicious. Think of deli meeting mindmaps. For example, pick a random userid from deli and put it in extip, see mikew42. Cool order?

Today I got my 360 Yahoo account, something like gmail meets orkut meets goole but than Y! branded and all in one. Anyone else wants some?

I am not a [flickr] person but they growth of this [w:social software] site is 30+% per month and the impact on the web is getting bigger as well. Their use of [w:taxonomy] (or even better:[w:folksonomy]) is rather good. now you can browser through keywords in a postcard style at airtightinteractive.com.

A cool wiki page about drupal from the bryght guys. The make money doing it the GPL way with the best CMS around, drupal.