Excellent! Arma has always had some great eye candy down low, but that Vietnam mod looks amazing! It looks just like Hollywood says it's supposed to. I'm also pleased to see mission designers stressing the boundaries of the Arma mission editor - it seems to be a very powerful tool.
You hint to this in your write-up, Beach, but the hi-fi helo dynamic option really does NOT work with the GrumpyRhino Huey? Or it's just not on by default? If it doesn't work, I seriously hope that's on somebody's to-do list. I'm really stoked about the merge of helicopters and realistic infantry combat—Dslyecxi's video on air assault hooks me, every time I watch it—but the basic Arma flight model just kills it for me.