Few days back, I read a post in BHW , where someone gave idea to check the cleanfile urls to get niche ideas. I automated the process today by using C#. and with 6k web requests , I got this list : Part 1 : http://pastebin.com/Dt47zNut Part 2 : http://pastebin.com/fEKFrE5c Part 3 : http://pastebin.com/4hd8FS7L Part 4 : http://pastebin.com/jLzK1EjM Part 5 : http://pastebin.com/8Rjp8jmY Part 6 : http://pastebin.com/Pn0jjaZA you guys can check, may be you can find something useful. If you guys require more data, kindly post in the thread. I will query further and give you more data.