hmm co.cc and co.nr rule ..there are other sites like smartdots that have domains like com.nr or net.tc but they have a stupid web bar ....{I think you can kill that bar with something like kill frames but i"m not sure}..just google and you'll find..
and a good idea is to make a redirect..make a dot tk account and redirect it to your co.nr adress and select at co.nr to kill the frames...for me it worked in firefox..when you type
www.yoursite.tk it redirects to your
www.yoursite.co.nr and you get rid of the dot tk banner