A handful of students in a class I teach hadn't realized that the Wikipedia was 1) user written, 2) editable, or 3) discussable. They never even tried the tabs at the top, so a student put the question to me in class today: how many of those that access a page access its discussion page? On #wikipedia folks noted that such a feature is possible with Wikimedia but disabled and any such statistics are hard to get since there's so much and can hurt performance if enabled. Any other thoughts?