Conflict History is a fantastic idea but needs some serious touching up. It offers an interactive look at the locations of battles and other conflicts throughout history. Unfortunately, it limits viewable date ranges to 100 years at a time, and it cries out for better ways to parse and represent the data.
I think it would be best to have an animation not unlike Nathan Yau's Wal-Mart growth map with dots of different sizes appearing based on, say, the number of causalities. Ideally, the animation would show changes in countries' borders and population distribution over time. It would also offer interactivity so people could pause and click a dot to quickly learn more. It would be an enormous task, but an invaluable tool to anyone studying history.
