If you already took a chat roulette code and placed it on your site, and you if your site already had some visitors, then you can see your site listed on this page
http://www.cam2camsite.com/external-sites. There is also a chance to see your site stats of visiting. Plus, if you will update the code on this page
http://www.cam2camsite.com/external-chat you would also be able to add your site Tittle and Description. Let me remind you that links to external sites may improve your position in search engines.