Actually, no one can tell you when this hotel will open and be 100% sure it's the truth. The resort IS supposed to open in December but on time openings don't always happen in Mexico. There was another resort that was supposed to open in December (Valentin La Hacienda) and they have pushed their opening WELL into 2007 (spring or summer). Iberostar is pretty good about having things done on time, but some things that could force a delay can also be out of their control. Right now they say they are on schedule, but who's to say that's completely correct or will remain to be the case? It probably will open, but no one can say for sure until it actually does.
I would just stay in touch with your TA (if you have one) and make sure he or she is keeping up with the current situation.
As far as any brand new resort "running smoothly", one usually will not see that happen for the first month or two. Again, that's typical, doesn't mean it'll be the case here.
*edit*
I also edited the title of the thread so people would know what you were asking.
"has anyone seen it yet" could mean 1,000 different things
and I almost deleted this before I read it thinking it was spam.