WordPress.org

facebook is gradually owning a tiny space in each and every website. If you want to implement facebook comment for your posts or just want to add a like and a share button on your post/pages this plugin is a powerful solution for you. you can decide in which post/page you insert comment/like/share. There's a option box under the main post editor, you'll find several options there. Moreover, you have options to implement those in all posts overwriting individual settings in admin panel. for more info visit: http://hasnath.net/total-facebook-plugin-for-wordpress.php

However, if you want to disable wordpress's default comment system (and want to use facebook comment) you can use another very powerful comment disabler plugin: Comment Disable Master, http://wordpress.org/extend/plugins/comment-disable-master/