My Twitter folksonomy. I'm glad to see that present continuous verbs are the most used.
Yes, there is a reason why I'm using this machine tag. Watch the next release of Last.fm for machine tagging goodness on events.
An experiment in social tagging of art museum collections
Fantastic collection of user-tagged content at the Powerhouse Museum in Sydney.
This new method in the Flickr API could be used to create some fun zeitgeist-driven mashups.
As a follow-up to my post about Yahoo's term extractor, I should point out that Tagyu also has an API. It's RESTful and simple.
Daniel Pink explains folksonomies.
This excellent little plug-in allows you to search your Del.icio.us links from Spotlight.