Look at this link <a href="http://www.kolbrenerusa.com/blog/index.php/2007/12/04/50-top-niche-social-media-sites-and-their-power-accounts/ http://www.kolbreneru

Look at this link <a href="http://www.kolbrenerusa.com/blog/index.php/2007/12/04/50-top-niche-social-media-sites-and-their-power-accounts/ http://www.kolbrenerusa.com/blog/index.php/2007/12/04/50-top..."> 50 Top Niche Social Media Sites, and Their Power Accounts </a> there are plenty of niche clones