WordPress.org

Does this plugin add any database tables?

Yes. One table called (yourprefix)_wptwitipid is added

How do I uninstall this plugin and the database table it creates?

Just deactivate it and use the delete link on the plugin page to remove the saved options and database table.

I already use wp-twitip-id, is this compatible?

Your exisiting db table for wp-twitip-id will be used. You may need to check your settings for automatic setting and adjust your link output changes you made in your template file.

Will this plugin work with Disqus/Intense Debate/js-kit?

This will only work with the standard WP comment form

I want to create the follow link myself, can I get the stored username from the comment via php?

Yes, you can access the twitter username (if it exists) in $comment within the loop. Use $username = $comment->twitlinkid to retreive the username.

How do I add the extra field in the profile page for the twitter username for registered users?

see [http://justintadlock.com/archives/2009/09/10/adding-and-using-custom-user-profile-fields] (http://justintadlock.com/archives/2009/09/10/adding-and-using-custom-user-profile-fields)

I am having a problem getting it to work

You can submit a support ticket at http://comluv.com