If this is still going on, I would like to nominate the Marcum-Markham web site.
Not only does it identify the ancestor, for the most part, it puts the name of the person being tested on the page. It also has a patriachs page so you can make sense of all the names.
David W Morgan
Added by Terry: the Marcum-Markham results page is at http://worldfamilies.net/surnames/m/marcum/results.html