According to Cerenvy, the replicas are much heavier than you might imagine. They had to flex a bit to hold the treasured swords aloft. Angrist and Nymeria of EU Darkspear also appear in the pictures with their own replicas, and the chaps spent a little while whirling the legendary weapons around. I hadn't been really interested in the swords. Now that I can get a better look at them, thought, I might find out about getting one to hang on my own wall. While the price seem a little steep, it definitely looks like they had a good time.
Gallery: Frostmourne replica in action