Changes in my web rcts on facebook

i created a website in which the different people can register themselves after registration they registers their products which includes prices,specs,photos,outlet detail,benefits etc now i want is that i want to connect with facebook,twitter,my space now i want is whatever changes took place in my web page (products page will automatically updated to my facebook myspace n twitter my requirement is that what ever changes take place my web will easily saved into facebook walls so what technique i should use