I'm a little behind on the postings on this one since others have covered it already, but wanted to congratulate Ann on getting Maya's Mom off the ground. Ann's a friend from a long time back, and she has a good sense of what it takes to build a community-driven site focused on the mommy demographic. My initial thought when she showed it to me was that it was sort of a Facebook/LinkedIn/Myspace for moms, but the more I look at it I see the potential to develop About.com-style category owners/editors.
As with any community site, it all comes down to how they nurture the fragile ecosystem of their users -- they are off to a great start so far, so keep up the good work!