I just had this same conversation with my surgeon today. I was banded 10/23/09 and had my post-op appt today, I lost 8lbs since surgery. Which my dr said was terrific. I have my next appt Dec 7th and when I asked if I would possibly get a fill then, he said maybe but maybe not. If I lose another 8lbs by then, he'll leave it alone and then see the next time. He said the highest weight loss in their practice (like 300lbs) never had a fill, so it really isn't something he will commit to until they see a reason it becomes necessary, like not losing weight due to plateuing, or no restriction, gaining weight...
Good Luck on this wonderful Journey! I am looking forward to mine.
Peace~Love~Happiness