I've just stumbled across an excellent article by Ellyssa Kroski about folksonomies (user, rather than expert, created taxonomies):
The Hive Mind: Folksonomies and User-Based Tagging
Now that Amazon is letting its users tag items, how long before we see this functionality in the OPAC? I'm getting very tempted to add a tagging facility to our test OPAC server.
…well, I gave into the temptation and I've added a basic tagging system to our test OPAC server (http://wwwlibrarycat.hud.ac.uk) – here's an example:
http://wwwlibrarycat.hud.ac.uk/bib.html?320261