Per bug #19815 and the discussion on the Watercooler, all users who have the "Editor" group (You know the one that lets you sight edits), also now have the ability to roll back.
https://bugzilla.wikimedia.org/show_bug.cgi?id=19815 http://en.wikinews.org/wiki/Wikinews:Water_cooler/technical#Rollback
Just an FYI
wikinews-l@lists.wikimedia.org