Using a folksonomy to find out about folksonomy

I am researching a training course on folksonomy and its application inside organisations. 

The best source of material has been Del.icio.us -  which is itself the best example of a folksonomy on the web.

The Del.icio.us tag/folksonomy page shows every website/article/blogpost that anyone has seen, liked, and tagged with the word folksonomy so that they can go back to it at a later date.

By changing the word after tag I can use Del.icio.us to find material on taxonomy, cricket, records management, the future, or anything else that takes my interest.

Del.cio.us lacks Google's universal coverage (it only knows about the things its users have alerted it to)  but it beats Google for variety, novelty, currency and serendipity.

The Del.icio.us tag/folksonomy page brings up new references hourly.  Other pages will bring up new references by the minute or by the day depending only on how many other users are interested in that topic and use that word to tag. 

In contrast a Google search on folksonomy would bring back results that change little from day to day:  because the rankings (based on the extent to which a site is linked to) take a long time to change.

Del.icio.us is quicker to reflect new material than Google.  Only one person has to tag a post a site  with the word 'folksonomy' and I see it on the tag/folksonomy page.  It appears at the top of the page which, like a blog, is in reverse chronological order by time of posting. 

The serendipity effect comes in when I find a web resource that is useful.  I can then find out:

• what else has the person who tagged the resource bookmarked?
• who else has bookmarked the resource that I found useful (and what other resources have they bookmarked)?

For the record the best overview of of the topic that I found was Philosophies of folksonomies  saved by Juerg Hagmann.  This has serendipitously led me to Juerg's blog about records management.