I want to expand on sparks [answer][1].

One of the goals expressed by Jeff/Joel for StackOverflow is that it become a repository for existing knowledge.  As they have said on the podcast, Google is the front page for these sites.  If you need an answer **now**, hopefully SF or SO will have it.  It doesn't need to be immediately responsive to new questions in order to be successful.  

If something is broken, needs to be fixed right now, and there isn't a useful answer on SF, I would post the question, but I would also engage other support resources.  Certainly, there are responsive folks paying attention, but one can't count on the best (or correct) answer popping up immediately.  The idea is that the best answer will bubble to the top of the list through editing, comments and voting.  

SF is not intended to be a substitute for proper support mechanisms on key systems!  My expectation is that it will become a useful tool in our arsenal, but not the only tool. 

  [1]: https://serverfault.com/questions/10391/is-serverfault-as-useful-as-stackover-in-principle/10398#10398