I was banded on Nov.03, 2008. I have the same issue. The gas can be so painful. I tried using Gas-X, that kinda helps. Like others have said this too should pass.
Good luck.
My surgery was on November 3, 2008. I feel for you. But hang in there. Interesting, when I sip on apple juice, or any juice I get a heavy dose of gas, its horrible. Try fat free yogarts and strained soups, like the others have suggested. I found Carnantion Instant Breakfreakfast with skin milk to be great protein supplyment twice a day.
Good luck.