https://etherdelta.com/#CSNO-ETH
etherdelta has added CSNO, because I think CSNO needs to get other exchange sites
etherdelta has added CSNO, because I think CSNO needs to get other exchange sites
They will probably be on other exchanges soon.
HitBTC and EtherDelta for now, live and trading now. I think there were some talk about the possibility of exchanging CSNO within the site itself, but I'm not sure about that. It would be a very neat feature though, especially when there are more players, more deposits and maybe even more supported currencies.