Interesting article DT. The fact is that wooden cutting boards have been used for who knows how many centuries without there being any significant link to illness from the use of them. Like so many things these days I think some bureaucrat somewhere came up with the idea that they weren't safe and that plastic would be better without doing the proper testing to make sure, and it turns out they were wrong.
As far as woods which are appropriate there some woods which can be toxic such as yew for example. It is near or at the top of the list. However, an article I read suggested that used in a cutting board the risk is quite low, that toxicity would be more likely in the form of an allergic reaction which is extremely hard to predict and fairly rare. The most common and most dangerous form of toxicity is in the inhalation of dust particles instead.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.