Interactive maps are one of the greatest advances that the interwebs have brought to the masses.  The maps themselves can tell a story and the story can be fleshed out by various links and addenda.  And this is how you do an interactive map right:

http://invasionofamerica.ehistory.org

More of this, please.  The map shows all the takings of land from the Native Americans by the United States of America.  History is so depressing.  You can play the timeline to show year by year what portion of land was ceded to the U.S.  You can also click anywhere on the map and get a listing of all of the treaties and cessions that occurred for any piece of land.