Estrogen Replacement Therapy -- Any application to soy?

With all of this negative info coming out about estrogen replacement therapy increasing women’s risk of breast cancer, heart disease and whatnot, I’m wondering if any of you biochem gurus have any opinions as to how those correlations might analogize to the phytoestrogens in soy?

I haven’t read the estrogen studies, so I don’t know anything about the dosages and how they would compare to what all those silly “For Women” products carry in terms of phytoestrogens, but I would think there must be at least some analogy.