There's a Japanese magazine for kids that supposedly rocks--hard--called Mammoth. It was started by Lucas Badtke-Berkow, the founder of Tokion. While it definitely targets (hip Japanese) moms, it sounds more substantial than just a Wallpaper*-y design mag.
I mention it because they just launched Baby Mammoth, "a lifestyle magazine for new and expecting papas and mamas." At least that's who they said it was for last fall. By the time it hit stands last month, it was narrowed just to "mothers," even though it looks like there's a dad on the cover.