uwMike » WP-Cats
WP-Cats is a WordPress plugin that aids in mass category management.
What does it do?
WP-Cats augments the Manage Posts screen with Ajax controls that allow two-click adding and single-click removing of categories from individual posts.
If a post is tagged with only Uncategorized, this tag will be removed when any other is added.
[via pixelgraphix.de – feine Sache!]