Tagging is great, but it has its problems for sure. One is the old plural versus singular dillema. I don’t have any set rules for which I use, which is a problem.
Flickr — oh, they are so great — have come up with an ingenius solution — clustering. So now you can see that Jaguar is separated between a cluster about cars and a cluster about zoos (but not animals?). And Bush is separated into clusters for the president, for nature, for trees and for… graffiti. Okay, so it’s not perfect, but it’s a real improvement.
Now to sort out the singular / plural thing!