NY TIMES - Feb 11 - Modamily.com is a Web site for people looking to share parenting arrangements. Several other social networks, including PollenTree.com, Coparents.com, Co-ParentMatch.com, and MyAlternativeFamily.com have sprung up over the past few years. The sites present what can seem like a compelling alternative to surrogacy, adoption or simple sperm donation. As with same-sex marriage, the laws on parenting partnerships vary from state to state. Elizabeth Marquardt, director of the Center for Marriage and Families at the Institute for American Values, says: “It’s a terrible idea, deliberately consigning a child to be raised in two different worlds, with parents who did not even attempt to form a loving bond with one another". “As children of divorce will tell you, it’s very difficult to grow up in two different worlds, with your parents each pursuing separate love lives that can be increasingly complex over the course of a childhood.” Others say she is missing the point that parenting partnerships actually spare a child the future pain of divorce.