I buy Mt. Shasta Spring Water with added Fluoride since we don't have it up here in the mountains and the largest cities in my county voted it down.
I have a 4 year old with some genetic enamel problems and he had 17 cavities when he was 3. I was appalled - my 3 older kids didn't get any cavities until they were old enough to sneak Skittles into school pocketed between their cheek and gums (my oldest did this and got 6 cavities and his dental hygenist uses this story when she talks at the elementary schools - without mentioning names.

)
He also uses Colgate Children's toothpaste. And gets regular fluoride treatments.
The article didn't actually note any of the studies - I'd be skeptical since every other day a new study says one thing and then the other.
steph