Pito's Blog: [ETECH] Taxonomy of Folksonomies: "One way to organize a taxonomy of folksonomies is to notice that there are two dimensions: Whose stuff is being tagged, and for whose benefit. Flickr ends up in the bottom right, and del.icio.us in the top left. But what about the other quadrants?
This organization gives a new way of looking at conventional concepts like folders and directories on personal computers (my stuff/my own benefits) and Web based directories like Yahoo (other people's stuff/other people's benefit.)"
Lots of interesting analysis at the intersection of tagging and hyptertext lately, e.g., also see Jon Udell's Prime-time Hypermedia series.