I've registered about 5 of the .co.cc domains, I used theses domains for almost everything, When I was really new in the hosting industry I ran a small reseller host off a .co.cc domain funny right, the only bad thing really about it was that you can have custom name servers, I had one for a host, one for gaming and even some more for like my portfolio and little forum sites, But over the past months I have cut them down and gotten a .com or .net domain. I sometimes have some clients come to me that are around the age of 15-13 and they coem with a .co.cc domain, I mostly host gaming sites like ladders or forums and even team sites. Mostly gaming because I know a lot of people that play gaming and open up a team. But after a while when there using that .co.cc domain or .co.nr domain they would but a .net domain after a couple of months.