In this post, Nutrition Diva's answer for question #10 "Any good suggestions for getting enough protein as a vegetarian?" includes soy. While the rest of her answers appear to be on track with the latest studies (vs. what a lot of doctors/"experts" recommend), this one in particular worries me. (I blame @codinghorror for tweeting this post in the first place :))
From what I've read, phytoestrogens (which non-fermented soy is extremely high in) have been shown to contribute to many problems for males, specifically with cancer and fertility issues. I believe there are also cancer-related issues for females but haven't read as much on the subject. Unfortunately, neither books (e.g. Slow Death by Rubber Duck), nor video (e.g. The Disappearing Male) are easily linkable and I hesitate to take random sources procured from searches since they don't tend to be based on actual peer-reviewed, unbiased (i.e. non-sponsored) studies.
Is there a (linkable) affirmative source that has the same information?