More than 10 million Americans moved from one county to another during 2008.  This map visualizes those moves.

It takes a few seconds to load, but gives specific information about numbers and average income per county.  A great resource for your organization!

Click on any county to see comings and goings: black lines indicate net inward movement, red lines net outward movement.

http://tinyurl.com/2vu5nwp

Source: Forbes.com