I agree it's important to be diligent/vigilent during the first 6 months. Fight the good fight as best you can, and be honest with yourself. If nothing else, facing the "real you" in the mirror is the most important thing you can do for yourself. As you lose the weight, you might be forced to face that person in a very unexpected and very visceral way. So start now.
I am 10 months out, and certainly eat way differently now than I did during months 0-6. I eat carbs (bad and good), occasionally eat fried stuff (but it doesnt agree with me too well), and basically do whatever I want.. Just in very small amounts.
I do however work out more and more as time goes on. My goals are getting bigger as I see myself as an athletic person. I strongly believe that developing exercise routines as early as possible is integral to long term success.
For reference - I started at 215.6 on the day of surgery (Apr 26 2012) and am now about 135-137. I got to about 150 at month 6 and am slowly shaving off the rest. My goal is 130. (I'm 5'3" and quite muscular/athletic.)