I’ve been looking at the animated grade statistics report, or visual report, a GSoC project by Daniel Servos. The different visualizations are very impressive.
The plan is to add the visual report to Moodle 1.9.5 and 2.0 – see MDL-13501 for more details.
I’m very happy with all the feedback we’ve received about gradebook tabs navigation, both in the forum discussion New gradebook navigation – Tabs and in the tracker (MDL-18004). There are just a few things left to decide upon, then the code will be added to core.

Hi Helen,
great work. Do you know when this will be available for 1.9 users?