I was banded on 12/28/10 and consider myself very fortunate! I did not experience the gas pains that I had expected and was never nauseous. A patch was placed behind my ear prior to surgery as well as meds in my IV prior to and a pill called Emend that I took before hand with a tiny sip of Water. My Dr. takes all precautions to avoid nausea and I am glad he does. I also had a prescription that I had filled for nausea, but never used it. I only took a pain pill the first day and have not needed anything since. I did the Clear liquids for first 3 days and on day 4 had a smoothie and some cream of potato Soup. Could only get small amounts of them down, but I felt full and satisfied.
I have two friends who were banded on the 30th and both experienced terrible gas pains. One of them had the same Dr. as me so don't have a clue what the difference is. I really felt bad for them, but am glad I didn't have it!
Your experience will most likely be unique to you, but I wish you all the luck in the world.