Dapper

From MashupCamp

Dapper is a free, web based service that allows anyone to make a feed or API for any website. Put more simply, Dapper is an easy way to make dynamic feeds that change when the content on the original page changes, or based on user input. With Dapper, anyone can create RSS feeds, universally embeddable widgets, and XML (among other formats) for any web site. Dapper works by analyzing the website's underlying structure to enable the creation of robust feeds that remain intact even when the page changes. If you're wondering, the name Dapper comes not only from our vision of making the web more "dapper," but it describes what we do - mapping data on a page (Dapper = Data Mapper).

More at dapper.net[1]