I had five websites which ranked in page 1 for competitive keywords like 'Premature ejaculation' But i was hit by Panda in May 2011 and one by one all my sites stopped ranking.Even when i write a new post for a uncompetitive keyword phrase i am usually in 100+ positions. I Tried registering new Domains and start writing new content in them.They rank well for the first one month but then they all get slapped by google. I don't use any blackhat backlinks at all. How does Google identfy all the new websites i make?Is it through my hosting ...where i host all these domains? I have bought a new hosting to host my next new site i am going to create....Should i get a new godaddy account as well? Or am i being Paranoid here?