[Magic.]

Seeing as most women who breast feed in public don't make a big show of it, and barely show anything as they feed their baby I have no problem with it.
There is a mother at the school I work at however, who breast fed her 3 year old child in the middle of the Easter Church service, like in the middle of a pew. Now there were other mothers breast feeding, but their children were younger and they moved to a free pew at toward the back so as not to disturb others, which nobody had a problem with. They did however mind a three year old being hauled up and wriggling around while feeding.
Basically I think there's no problem with public breast feeding if you respect other people's personal space, and don't go parading it around ...