Imagine lively people-scaled communities dotting the San Francisco Bay Area - places co-created by their residents for raising kids, for retirement, for growing food or simply living well by sharing more. The Bay Area already has ecovillages, and cohousing neighborhoods, resident-owned housing cooperatives, and group houses -- real world places where we can live more sustainably through a more cooperative way of life. You can have both privacy and community when you know your neighbors on …