Jean Quan, Oakland's 46th mayor, is part of a groundswell of women who are successful because of pragmatic approaches."The same old way of doing things just won't cut it. We've got to dig our way out of this morass," says Quan.The World Economic Forum's gathering in Davos, Switzerland, "showed a piqued interest in integrating women's economic points of view," says Marie Wilson, author of "Closing the Leadership Gap: Why Women Can and Must Help Run the World." Retirement guru Ken Dychtwald predicted two years ago, "By 2010, 60 percent of the wealth in America will be controlled by women."According to …