A new plugin called LMCommentModerator has been released. This is a plugin for comment moderation. It will let you keep commenting open for all, while you will still have full control over which comments that get posted to the blog. Unregistered commenters will have the possibility to edit their comments for one hour.
The plugin includes a simple spam filter which let you whitelist or blacklist on member, ip, email address or website. In addition to that it have a spam filter API, that supports additional plugins for spam check.
The LMCommentModerator plugin require some setup before it can be used. A step by step guide on how to set up your Nucleus installation to use the LMCommentModerator plugin for comment moderation can be found here.
The plugin can be downloaded from the LMCommentModerator plugin page.