DC Facebook Like Popup
Getting Facebook Fans on your homepage is a natural extension to the success of your website. A proven way to increase Facebook fans is having a popup with your Facebook page when users visit your website.
This plugin is a very simple plugin which will quickly boost your Facebook fans. These are some of the great features of the Facebook Popup
Popups up with an overlay such that it becomes very prominent to encourage your visitions to become fans
Customizable "Follow us on Facebook" title
Can show it to guests only, logged in users, or ALL
Configurable date to sets cookie so that users won't have to see this all the time, but only once every few days e.g. every two weeks.