Ok, I just got back from Team Nissan. One of the guys came out and inspected the damage. He looked at the shaft and said there was no damage. The part I was trying to think of the name that blew up is called the outer cv joint. So I ordered that and a cv boot kit totaling about $140.

I also talked to the Service Manager about a warrenty claim. I think I have a 50-50 chance of getting them to pay for the repair but I'm not banking on it.