Personally, polygamy is exactly the same issue as gay marriage, supposed it is between 2 (or more) consenting adults and there is no physical or mental force or abuse and every party is completely voluntered for the relationship.
Now saying that, there is still the problem of law. To answer the OP's question, of course not, at least not openly as we know it.
Just to make this thread actually interesting, since we know that LDS leaders lied in the past about this practice, the question arises:
Can we be sure that they don't lie about it now and at least for a few chosen the practice of polygamy is still allowed even if it is officially a reason for excommunication?
And the answer is no, we can NOT be sure....