Last week I've been working on a website which shows the estimated worldwide reservations: http://www.model3map.com. On this website you can see the estimated reservations per country and you can also zoom in on the US, Canada and Germany. The accuracy of the map will get better over time.
The estimates are based on a sample of the data at model3tracker.info where you can register your reservations (not your reservation number) to get a good overview of the worldwide reservations.
Let me know what you think and if you like it, please share!