Hierarchical/categorization : personal ontology

Chad ran across a good article about ontology and how categorization has become much more of a personal thing than it used to be. I’ll refrain from starting a discussion about how the amount of personal information we all manage has become so much greater and just let you read Chad’s weblog post as well as the original article. Suffice it to say that if I had a good way to tag more of my files, bookmarks and such I think I’d search less and find more.