I’m interested in tagging.
I love the way that books can be on two shelves at once in cyberspace.
Pursing this idea to see if I can do it better on the Mac has led me to
Default Folder x
Ironic software who make Deep & Leap — though I can’t tell which one I should use.
Noticing that Path Finder, that I already use has an option for OpenMeta tags (that all the above use as well)
And
More strangely to this site, which may or may not be related:
http://openmeta.livejournal.com/
But has some interesting stuff about Gurdjief and states of consciousness

And that led to a lovely entry on Gurdjief in SkepDic
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I doubt there is a connection with Gurdjief in any way, but tagging does do something to your consciousness…
This is about straight tagging:
http://code.google.com/p/openmeta/
Just as well I can tag this post!