Forbes has an interesting, interactive "data graphic" that shows where Americans moved in 2008. Click on a county and you'll see lines indicating where folks moving to the county came from, and where folks leaving went.
Here's the mass exodus from Detroit:
And a mass influx to Austin:
The pattern for Palm Beach County is what you might expect:
Hover over a county and you can see the net inbound and outbound migration between those two locations:
It is an interesting way to look at market dynamics that could inform your marketing. Plus, it's a lot more fun than plowing through raw IRS data!
