You and the rest of the devcoin community should take a look at the rest of the list and let me know if there are others you view negatively so I can skip them.

I would advise against c-cex - after going "on holiday" for a month leaving users unable to access their coins they seem to have done a Yoshit: ignoring tickets, abandoning their BCT thread & multiple reports of missing deposits/withdrawals - check out their thread, it's nasty.