As of this moment I know of two clones of the site freebitco.in, 
so far Freebitco.in has the best reputation but I think the clones are promising too
please use my referral links to join if you haven't already:
http://freebitco.in/?r=348200
http://freebitcoinwin.com/?r=3345
http://freebitcoinnow.com/?r=6707