are you saying the ability to flag questions is currently not available but will be with Moodle 2.0?
I tried the OU quiz. The OU quiz lets you “check” a question before submission, which is like reviewing before submitting the quiz.
What I am asking for is different. I am looking for a way to flag or bookmark a question as you proceed through a quiz so you know which questions to go back to to review either because you found yourself spending too much time on the question or you want to know which questions to go back to for extra attention. This is very useful when there are a lot of questions in a quiz and you may not have time to go over every single one before submitting.