Hey,
I was a little less lucky, I lost my facial nerve after a long surgery. So I went through a seperate procedure about 3.5 hrs long in which they took a nerve from my tongue and grafted it into the facial nerve, they also inserted a gold weight, 5oz., into my eyelid to help me get a full close. It has taken some time for the graft to catch on, but I have sense regained about 50% in a year and a half, probably going to stay there, and I am fine w/ that. The doctors know that keeping the facial nerve is crucially important to every one of their patients, so if I were you I would have him talk to you about the care of, and heaven forbid something bad happens where they have to cut it, the options for nerve graft, recovery, and all that fun stuff. A good test to do in front of someone is blink both of your eyes as rapidly as you can and see if there is any drag in the eyelid of the side that your tumor is on, I thought that I was fine but had quite a bit of drag once we did that simple little test. Try that and let me know what happens.
Brian