Link to Pew Research Center Survey, "57% - I Want To Go Where It’s Warm".
Excerpt: Most like it hot: Fully 57% of the public prefer a hotter climate while 29% would rather live in a colder one. Men or women, rich or poor, college grad or high school dropout, similarly-sized majorities favor living in a place that is hotter over one that is colder. Though blacks (69%) and Hispanics (62%) are significantly more likely than whites to prefer to live in a hotter place, a majority of whites still choose a warmer community (54%). This doesn't mean that Americans don't like colder cities. Often-snow-covered Denver and less-than-balmy Seattle are high on warm-weather supporters list of favorite cities.
Then there's this article in today's New York Times, "Slump Creates Lack of Mobility for Americans".
Excerpt: Stranded by the nationwide slump in housing and jobs, fewer Americans are moving, the Census Bureau said Wednesday.
The bureau found that the number of people who changed residences declined to 35.2 million from March 2007 to March 2008, the lowest number since 1962, when the nation had 120 million fewer people.