I was just at the Robinson Safety Course last month and Kurt Robinson mentioned the blowing snow limitation for the R66. He said they have a ship sitting in Canada and they are just waiting for the proper conditions to do the testing and get the certification. He didn't elaborate on what the specific conditions have to be, but he did say they've been waiting some time to get it done.
It may not be around the corner, but it does sound like the certification will be coming at some point down the road.