It's not clear (to me at least) what is the difference between the "need answer" and "no answer" options in the "show" drop down when viewing questions (need answer tab).
Edit: After experimenting a bit it seems that perhaps the difference is that the "need answer" are questions without an accepted answer, while the "no answer" questions are those without any answer at all. Is this truly the case? Perhaps the wording could be a bit more intuitive...