I'm reading Ben Fry's book Visualizing Data and having some serious fun with mapping. I invented some shipping data (from my home state of Ohio to the other 50) and then put it on a map of the US using some of Ben's example code. I didn't manage to get the animated version to work on the site, but it's still pretty... If you're interested, let me know and I'll pass along the code. Below is an example of the output. Love to hear your thoughts.