#sxd advice to client: Folksonomy requires 50-100k+ users. Good categories require specialists. ∴ hide tag/category mgmt from regular users.

Tag Gardening for Folksonomy Enrichment and Maintenance, by Isabella Peters & Katrin Weller (2008)
As social tagging applications continuously gain in popularity, it becomes more and more accepted that models and tools for (re-)organizing tags are needed. Some first approaches are already practically implemented. Recently, activities to edit and...

Automated Tag Clustering: Improving search and exploration in the tag space
The use of clustering techniques enhances the user experience and thus the success of collaborative tagging services. Clustering techniques could improve the user experience of current tagging services. This document * describes the current...

[pdf] Constructing Folksonomies from User-Specified Relations on Flickr, by Anon Plangprasopchok (2009)
Automatic folksonomy construction from tags has attracted much attention recently. (...) Instead of tags we propose to use user specified relations for learning folksonomy. We explore two statistical frameworks for aggregating many shallow individual...

folksemantic
a new search tool that lets you meet up, collaborate, discuss, remix and develop learning resources

This Taxonomy/Folksonomy cookbook brings out the IA geek in me: http://bit.ly/xhfhO