Isn't data "beneath the metadata"?

For the most part, this is just a placeholder for links to Elaine Peterson's Beneath the Metadata: Some Philosophical Problems with Folksonomy, to David Weinberger's reply and Tom Vander Wal's reply as well. I've got some work and at least one meeting before I can turn to them, but turn to them I will. It shouldn't take too much sleuthing to figure out where I'm going to weigh in...