Could having links from a virtual domain (ie. http://y2k.comco.org) to a regular domain (ie. http://www.comco.org) be a way to increase link popularity? Is a link that goes between 2 different IP addresses enough to improve link popularity or does it need to go between 2 different domains? What do search engines use to identify outbound links? 2 IP address or 2 domains? Thanks!