One of many ways to check out trends across the nation, is to follow relocation/moving trends from moving companies. I have included two reports that have recently been published this month that shows moving trends from 2009 and back to 2007 or so. I just thought I would share my findings with the group.
http://www.upack.com/Press/PressReleases/2010/MovingTrendsReport.pdf
http://www.atlasworldgroup.com/migration/pdf/2009_Migration_Patterns.pdf