I have a few unanswered questions at stackoverflow. The most recent one is two days old and has two views, one view per day. This makes me think that the reason the question is unanswered is not that no one knows the answer, but that no one has seen the question.
Out of curiosity I looked at the unanswered questions section at stackoverflow to see how many unnoticed questions like mines were out there, but I did not find any support in the UI to identify such questions.
I suggest that you add the possibility to order unanswered questions by fewest views per time. This way it would be easy for the community to find the questions that hasn't been noticed and had to wait for an answer for too long.