Good discussion. I have also been taking the Garden of Life Vitamin Code.
Regarding beta carotene as preferred type of Vitamin A and folate vs folic acid, I think the general idea is that these nutrients should ideally be coming from food and not supplements. That while uptake/absorption might be greater in the synthesized forms, there is such a thing as too much and/or toxic levels.
Fuhrman doesn't believe that any form of Vitamin A should come from a supplement (just vegetables), but I've also read that it's excessive amounts of preformed Vitamin A, but not carotenoids, that is associated with birth defects. And since I don't always eat a huge amount of veggies everyday, I'm fine with the beta carotene in the Raw Prenatal.
Regarding folic acid, even while it's everywhere and pushed hard on pregnant women, I think it's entirely plausible it predisposes us to higher risks of cancers. I think we have a long way to go before we really understand how nutrients affect our bodies, so I tend to prefer the more natural forms (folate) to synthesized formulations (folic acid).