I really appreciate this post, considering that I have encountered many parents, who think very much about what food to give to their children, but are less concerned with what they drink, or at least less diligent. It is important to point out how the consumption of sugar can lead to hyperactivity and tooth decay.
I recommend slightly sweetened herbal tea from the start, or thinned fruit-juice (half/half with water). Of course, forbidding a food, or a drink can cause rebellion, but controlling the amount by including an occasional soda every three or four days, or on special occasions, should do the trick. That is the policy in my home, and it is working well.
Again, great post, and great blog.

Have a wonderful day!