Kelly Sawyer Patricof and Norah Weinstein knew they wanted their nonprofit, Baby2Baby, to do big things to help kids living in poverty. But they didn’t realize that a photo featuring Jessica Alba and Nicole Richie at one of their first events would lead to a donation of 100,000 diapers and a totally new strategy for growth. They talked with us about running their nonprofit as a business, working together as co-presidents and why their work is nowhere near done.