I just saw this posted over at Stand and Deliver, and I definitely want to see it. It's a documentary (coming this spring) which follows four babies through their first year of life: Ponijao (in Namibia), Mari (in Tokyo), Bayer (in Mongolia), and Hattie (in San Francisco). The site says that the film "joyfully captures on film the earliest stages of the journey of humanity that are at once unique and universal to us all."
(If the trailer doesn't work for you, you can see it at the movie site)
Based on the trailer I think it will be interesting to note the different cultural habits (birth practices, breastfeeding, babywearing, etc) and their differing effects on the kids. After all, I've chosen some "non-mainstream" things (non-mainstream in the USA at least) because I believe they are the best things for my kids and family. However I'm curious to observe those behaviors in cultures where they are mainstream (for example extended breastfeeding is standard in Mongolia).