kaypo.me is an interesting service created by my fellow NUS SoC graduate, Kent Nguyen. It allows you to update your Facebook status via SMS. Not many people are on smart phones with data plan but almost everyone has a mobile plan that comes with at least 300 free SMSes per month. Even feature phones will work with this service as well.
Currently receiving or replying status’ comments via SMS is in beta, hopefully it will be available for the public soon.