We have a vacation rentals directory and a lawyer listings directory which we found easy to promote when submiting XML feeds to various websites like Google Base, Oodle and others. So we made a feed website for webmasters to promote their listing or classified based websites (cars, real estate, services etc.) We decided to make it very simple, so you only need to compile your XML feed, host it on your server, give us the link to the feed and we shall crawl it and display it online. We are working on attracting partner websites to display our data. Check it out: www.jacksads.com/ let me know what you think.