Link User Contributions to Article
Below every standard article is a list of users who have contributed to the article. The users' usernames each link to their member page, among other things, but what I really find myself wanting to know is "What did this user change about this article?"
So perhaps we should add a link to the popup that says something like "View X's changes to this article." Of course, the Special:Contributions page would have to be updated to take a specific article as a parameter (currently it shows contributions to all articles filtered by namespace).