The most important part of that article is the following:
"People aren't really categorizing information," Vander Wal says. "They're throwing words out there for their own use." But the cumulative force of all the individual tags can produce a bottom-up, self-organized system for classifying mountains of digital material.
I say, power to the people.
Its easier than ever for people to share and organize information. I don't think I'm alone in the belief that the way libraries organize their stuff is confusing (Library of Congress classification in particular). I still have no clue why computer books are sprinkled throughout the stacks for no 'apparent' rhyme or reason. I'm not saying there isn't one, I'm sure there are a million rules about what goes where. I'm saying its not clear to a non-librarian/cataloger. I get that its not meant for browsing, but browsing is what most people want to do. Online and off. How many instances have we had recently where the cataloging rules posed an issue? That should tell you something. Libraries, the places that are built on the organization of information, are difficult for the average person to use.
Why not let the people that use the place advise you about the best way to organize it so that they can find what the need? People want easy and convenient. Now, for the first time, they are beginning to have a choice. That doesn't mean there shouldn't be any rules at all. I think you can have the best of both worlds if you just let people organize to suit their needs on the surface and figure out how to keep your rules alive and well behind the scenes.
That's just my two cents.
P.S. Library Thing