I need someone to build an application that renders custom emoticons (smileys, sounds, Flash animations, winks....) inside chat, status/wall and message boxes within Facebook for now. (possible other sites and chat clients later on). It comes as a downloadable browser add-on for major browsers (Internet Explorer, Firefox, Chrome), available from a specific website. It should be something similar to [url removed, login to view], but only for facebook.
Please send me details about estimated time implementation and costs.