I don't think you can deposit NMC on CEX.IO. You can mine them and you can use them to get BTC or get GHS.
You absolutely can deposit NMC into CEX.io. You click Fund Account and there should be a NMC address there you can use to deposit NMC to. I just moved all of my NMC out of BTC-E to cex.io because I was getting better prices there.
Yeah, I tested that ("fund account") and it worked when I deposited some of the NMC I had lying around.
@botolo86: you just need to click "fund account" and send NMC to the address listed on that page. It works.
As per original topic on this thread, here's mine:
Don't be fooled though, most of that is from mining power (cheapo BFL Jalapeno miner) which I configured for mining on ghash.io so I can easily reinvest into more and more GHS