Here’s a really interesting use of maps–a graphical depiction of immigration to the United States over its history:
http://vimeo.com/moogaloop.swf?clip_id=2424744&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1
Immigration to the US, 1820-2007 v2 from Ian Stevenson on Vimeo.