WP User Reviews Plugin
This brilliantly simple WordPress Plugin interconnects any WordPress site with Facebook via the Facebook App that it enables you to create. WP User Reviews WordPress Plugin is a 100% plug and play application that empowers customers and clients to use their facebook account to log into your WordPress site and Rate and Review your products, services and business.
The App then publishes that rating and review to your site, the users Facebook page, all of their friends pages and your facebook fan page.
Plus a huge range of great features. Users can upload images with reviews - email notifications, Owner Replies, User Replies, Facebook Comments, Easy install, and customize and the list goes on.