Create feeds for all or most shopping sites..bizrate.com..etc.(repost)

I am looking to have someone create the necessary feeds so i can list products on third party sites like [login to view URL], [login to view URL], [login to view URL], froogle.com...etc. These feeds will be generated automatically on a timeline to be determined at a later date. I am not familiar with all the different sites and their requirments but am assuming it should be a simple creation of xml pages with specific fields of information.