Don't know your answer, but i think it is linked to your btc minimum payout option, i lowered that and then i started to receive nmc daily.
Also make sure that "NMC_Address=blablblahblah" is actually displayed on your my eligius page, near the submit changes button. I had to submit my info. a couple times to get it to work.
but when looking at my user stats page, only btc info is available, not NMC, but I suspect this is normal as not all features have been enabled yet...
I have the payout set to default, so does this mean that NMC will payout when their balance is equivalent to btc's minimum payout value?