In Moodle 1.9, gradebook reports are fully-featured plugins with a db folder, so they can create tables if they need to store their own data, or define capabilities. Also there is a nice mechanism that allows gradebook reports to add configuration settings to the admin tree, and they use get/set_user_preferences to store users' options for viewing the reports (perhaps some of these preferences, like records per page, should be shared between the reports). We would like quiz reports enhanced so quiz report developers have the same facilities available.