This would be a drop-in comment feature which I can insert on any page just by placing a "comment" field on it. Invocation would key on the originating page. (Needs modbot interface, of course.)

CREATE TABLE `comments` (
  `id` int(11) NOT NULL auto_increment,
  `page` varchar(255) default NULL,
  `author` varchar(255) default NULL,
  `email` varchar(255) default NULL,
  `title` varchar(255) default NULL,
  `touched` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
  `created` timestamp NOT NULL default '0000-00-00 00:00:00',
  `comment` text,
  PRIMARY KEY  (`id`)
)

Development status: well, I've defined the table. Don't really have time for this right now, but the code Muse has been pretty damn busy in my head lately.