I have written two WP plugins for technorati features. The first, Kramer, will insert inbound links for a post into comments, as well as provide a template function to display inbound links to a page (ie. the main weblog page). Unlike other plugins that show inbound links it will cache the response for a user-allocated period of time (set via the admin panel).
The second adds tag support to WordPress by simply using <tag> </tag> in your post entry around a word or phrase. It adds <tag> to the quicktag bar in WP admin.
Neither plugin requires DB alterations, cache directories or any tricks, they are both simply just the plugin file. I would appreciate all comments and feedback on these plugins. More information and download here: