Penelope Clayton-Smith pointed out this info graphic from the New York Times to me which shows the relative speeds and home countries of the top 100 supers on the list. Hovering over the scaled circle representing the performance of each machine brings up an information box on the system and its rank. Fun to play with. Be sure to click the “historical computing speeds” tab and look at a line chart done right.
The NYT has done created some very compelling graphics in recent times, including this one of movie box office receipts from 1986-2008 which is just plain fun to interact with.