I'm actually in favour of both positions but not because I'm not sitting on the fence, honest!! For me, the value of having an 'FAQ' style area is to enable 'repetitive' threads not to avoid having them; they allow those who are new to the subject matter to take advantage of existing knowledge/experience, have more informed discussions and consequently be more likely to advance something new. Let's face it, even the most commonly asked question was new to us all at some point and our education would have been poorly served if we'd only been pointed to text books; many of us learn better through discussion than through straight reading.
Sum ergo sum