In the place of traditional categories (taxonomy) will be tags (folksonomy). Categories will then be used to only to mark what kind of a post we're dealing with, not its content. That role will instead be handed over to Ultimate Tagging Warrior, which seems like the best bet for a folksonomy solution for WordPress.Given the debates about the use / usefulness of tags that I've seen this week at Library Clips and Rashmi.Sinha this strikes me as interesting. I have something more to say here.... I just haven't quite put a polish on it....