Facebook Connect Commenters
The Facebook Commenters plugin for Movable Type allows commenters to login and comment to your blog using their Facebook account. Upon login, a user will be created localy for this Facebook user, with their name and public profile picture. (if one exists)
Important: please be sure to review the read me file included with the file since you will need to create a Facebook app in order for the authentication and transmission of comments to Facebook to work properly.