Thanks to gamitzer for letting folks know about the Keshet Children's Book contest. Full disclosure, I'm the director of education for Keshet - the organization sponsoring the contest and we are really excited to see so much interest. We've been aware for years that there is a huge need for Jewish children's books with GLBT characters/families. We are hoping that this contest will yield some great manuscripts.
Leslea Newman does have a couple board books "Mommy, Mama, and Me" and "Daddy, Papa, and Me" that don't have Jewish content but are sweet picture books. For those of you who are Hebrew readers, I wanted to let you know about an Israeli book that includes same-gender families: "Everyone and Their Family" (in Hebrew "Kol Echad V'Mishpacha Shelo") is in Hebrew. It is a story told from the perspective of a kindergarten child who is anticipating his birthday at school and in the process tells about all the different types of families that his classmates come from including a two mom family, a single parent family, and others. It doesn't have Jewish content beyond the Israeli setting but it's something.
Please feel free to contact me directly if you have questions about Keshet's work or the contest. I can be reached via our Keshet website www.keshetonline.org or by email andrea - at - keshetonline.org. Please also spread the word about the contest.