I just stumbled over this bibliography over tagging and folksonomy related literature.
Library 2.0 Bibliography - Tagging & Folksonomies
I been meaning to make one myself, but now I am grateful for Monika Bargmanns ;-) There is a lot of articles from library periodical which I haven’t read. She also has a listing specific for social bookmarking.

The author of Web 2.0 research wrote to me that my thoughts about social tagging reminded her about a post by VanderWal. Its an excellent post that pins the sloppiness in our Internet jargon. Thanks for the hint.
VanderWal writes about the differences between the terms collaborative and collective.
Collaborative is consensus seeking and “usually aims at […]