Simple website design

We would like optimize the small box on our home page [login to view URL] that says "Compartir este cupon" to get more re-publications on facebook. I would like to eliminate the twitter and email buttons and do some elegant design work that draws some more attention to the facebook icon. The design should be relatively subtle as the goal is still to sell coupons, but should make the facebook republication stick out more than it currently does. I'd like to try one design that changes the phrase "Compartir este cupon" to "No seas egoista, diles a tus amigos!" (Dont be selfish, tell your friends!). I am open to other ideas as well. Pete