The Tags Power Tool for Movable Type: Movable Type has jumped on the tagging bandwagon with this plugin. It gives you a field for tagging, and publishes tags as their own category archives.
From a user interface perspective, Tags is implemented as a replacement for the Keywords entry field. In combination with a custom application template, the plugin replaces the Keywords box with a single-line Tags field that lets you enter any tags you want and assigns them as categories to the entry when the entry is saved.
The idea of "tagging" content is suddenly everywhere. With Flickr and del.icio.us and Technorati embracing the concept of tags, suddenly it's getting some broad acceptance. But what are "tags"? At the most basic level, they're just keywords — categorization without a master table of categories. Categorization that people…