I have not heard back from the companies, but ironically TD Ameritrade, where I have the stock has gotten back to me with the following:
Regarding your restricted shares of Pershing Gold and how that will be dealt with in the merger, short answer to that is, we don't know yet. When two companies merge they'll release information on the existing shares of a company, the two companies have not set the expectation for those restricted shares yet.
At this point I'd recommend reaching out to Pershing Gold's Investor Services department for further information, as if anyone were to have it at this point, they would.
So, I guess we will have to be patient for now.