Domain Mapping is the process of pointing a registered domain name to a blog or photo album. Domain mapping is more than domain forwarding (Free domains that are ending with .tk and .co.nr), because your permalinks and URL contain the address of your domain (www.you.co.cc), and not a sub-domain (example.trap17.com).
in wikipedia - http://en.wikipedia.org/wiki/.cc there a part of the article write : The .co.cc domain is not an official hierarchy; it is merely a standard domain like any other and is used for a free URL redirection service.
Oh, I didn't know that .co.cc is actually a subdomain This is truly useful information. Thanks for the warning!
Try some Uncommon names for ur site... U would surely get ur domain for free............ Free free freeee