you can host a single page and put like a banner, a center box, and a side skyscraper to fill the page with ads..make it something generic..then forward you domains to this page with the appropriate keywords/meta tags and mask them..this is easily done if you have your domains at godaddy (where I think you have most of them) within a day or so the domains should show the right stuff you target or you can just pick a target ad type in yahoo to pick what ads to show up...if you need help with this or want me to make you a page PM me and I can help..its easy..and works good