RetailMeNot Launches Facebook App, the online coupon site run by Austin's WhaleShark Media, launched a brand new, Facebook application today, which helps consumers browse and search coupons directly from the popular social networking site. RetailMeNot said its new RetailMeNot on Facebook "coupon experience" provides users with personalized and socially driven coupons and alerts. The new service is driven by social referrals from friends, through a "coupon feed" and other automatic coupon sharing features. The addition of Facebook comes on top of RetailMeNot's web site, iPhone, and Android apps.