Hey guys! I just wanted to say that Eliezer Yudkowsky has a fantastic article with intuitive explanation of Bayes' theorem:
http://www.yudkowsky.net/rational/bayes
It would fit perfectly as a part of this project, and would be a great starting point for explaining Bayes' theorem visually.
I would be happy to participate in explaining this, and also logistic regression, if you need any help =)