Kristin Jacobs, a suburban housewife, is an unlikely revolutionary. But in Broward County, that's exactly what she is. Jacobs, almost literally on a shoestring, unseated Sylvia Poitier, who had the backing and money of the most powerful and wealthy people in the county. And when Jacobs won, she turned the powers that be upside down, breaking up Commissioner Scott Cowan's decade-old majority vote. Jacobs now says she'll stop the ghastly westward push of development into the Everglades. It's a far cry from her neighborhood-activist days, when she was extremely effective in getting speed bumps put on residential roads to slow down speeders. After taking office last November, she blocked the contract of a county lobbyist who also represents U.S. Sugar, a company that's been criticized for harming the Everglades. It was a good start; now we just need to make sure she keeps delivering on her promises.