I asked on mtgox IRC official channel about this https://data.mtgox.com/api/2/NMCUSD/money/ticker
And by the api and the answer is really probably that nmc will be traded soon on mtgox.

Take your chances. 

Transcript...

[09:45] <Krlos> MagicalTux:  man sorry for asking again, i get a problem with my connection, We watch this https://data.mtgox.com/api/2/NMCUSD/money/ticker so we are thinking aswell that mtgox will be supporting NMC aswell?
[09:45] <@MagicalTux> Krlos: we'll have an official announce next week
[09:46] <Krlos> Thanks a lot MagicalTux so is true, but not now xD, thanks man