There's been a shake-up at Minnesota Windpower. Dan Juhl, with the company since its inception, has gone because of "differences," says the company's Bob Hinshaw. Juhl is also no longer president of Northern Natural Power Inc, says spokesman Greg Jaunich. Minnesota Windpower of Marshall is still a division of the Danish turbine manufacturer Wind World, owned by Lars Olsen. And Northern Natural Power, a joint development between Minnesota Windpower and Northern Alternative Energy Inc, still has 23 MW of yet-to-be-developed contracts with Interstate Power Co of Dubuque and Iowa Electric Light & Power Co of Cedar Rapids, says Jaunich.