Watch this guy's talk. It was a real eye opener for me. We've been taught since the 80's that fat and cholesterol is bad. But the overwhelming failure of this idea has done more harm over the last 30 years and instead of blaming the failure of the theory, we've been blaming ourselves. He brings up CDC charts on how obesity as grown in the US over the last 30 years after the fat=bad theory was accepted as fact, and its just damning.
I saw a link to this from a slashdotter on another story and after I watched it, I was sold. I got up off my butt, threw away all the cereals and breads in the house and went full bore. I started at 6'-0" 220lbs and lost the extra 20 the first month. I've plateaued since then, but despite my weight staying the same, I am still getting noticeably leaner in my legs, arms, and face. I believe this coincides with this study where participants on the LCHF diet gained more lean muscle mass despite no increase in exercise.
My wife hasn't been so lucky. She couldn't last a day being carb restricted. She is definitely addicted to carbs. She has to have pop/soda. Low carb dishes that I make that I find tasty and flavorful (after all they are full of fat) she doesn't eat much of because she says they lack flavor. She always has to supplement her lack of eating the meal proper with a sugary treat. Its very sad for me to watch because she was able to stop smoking cold turkey.